Friday, November 30, 2018

Effect of Capsaicin on the human body

Capsaicin in mouth



The capsaicinoids in chilli bind to a receptor in the lining of the mouth. This is the same receptor that registers pain from heat, thus the effect is a burning feeling. This is a result of the flow of calcium ions from one cell to the next. The pungent molecule has an electron poor area, which is attracted to the electron rich area on the receptor protein. Repeated exposure to capsaicinoids depletes these receptors, enabling you to eat hotter  chillies and feel the same effect. The pain caused by this leads to the release of endorphins,  the body's  natural painkillers. These give a feeling of happiness and well being.

The heat of peppers makes them more than just a food. They were used by the Mayans, thrown in battle at the enemy. Pepper sprays are the modern equivalent of this. Indeed, in high concentration capsaicinoids are toxic, and so painful as to be incapacitating.  Capsaicin can block the production of certain neurotransmitters, preventing nerves from communicating with each other.

Besides the information about pain receptors,  chillies have given much to medical science. Capsaicin cream is used to lower the sensation of pain in such conditions as arthritis, and other painful chronic conditions.

Chillies are high in vitamin C (about twice that of citrus fruits), dried chillies are very high in vitamin A, and red chillies are a great source of b-carotene. Chillies have antibacterial qualities, and contain bioflavinoids, anti-oxidants most common in apple juice.

Poultry for meet

Poultry for meet


Poultry consists of many varieties of domesticated birds. These types of poultry include 

a. Chicken
  1. Game Hens
  2. Broiler/Fryer
  3. Roaster
  4. Capon
  5. Fowl
b. Duck
C. Goose
d. Pigeon
e. Turkey


CHICKEN

According to origin the chicken are of four types.

Asiatic: Brahma, longson, cochin, asil etc.

English: Austrolorp, cornish, dorking, orpington etc.

Mediterranian: Leghorn, minorca, ancona, fayoumi etc.

American: Road island red, new hampshire, plymouth rock etc.



1. Game Hen

Game hens are typically 5-6 weeks old and are young or immature progenies of a Cornish chicken. It is very flavorful. The best method of cooking is to split and roast or grill.

2. Broiler/Fryer

Young and with a tender meat and smooth skin, the fryer chicken is typically 6-8 weeks in age and is relatively lean. It will have a flexible breastbone which is a good indication of the age. It weighs up to 2kg (4lb) and lends itself well to any cooking method as it is very versatile.

3. Roaster

A roaster is a few weeks older than a fryer and there is not much variation between a roaster and a fryer besides the age, which affects flavor and tenderness. It has tender young meat with smooth skin. The breastbone is less flexible than the fryer and is aged around 8-9 weeks. The weight is 2kg and over. It is suitable for any cooking method.

4. Capon

A capon is a surgically castrated male (Caponette will mean chemically castrated). It has tender meat with soft smooth skin. It is bred for well-flavored meat and contains a high proportion of light meat to dark meat and has a relatively high-fat content. A Capon is typically 4-6 months old and weight between 2-4 kg (6-10lb) and over. The preferred method for cooking a capon is roasting.

5. Fowl

A fowl is a mature female. It is quite flavorful but less tender than a fryer/roaster. The breastbone has no flexibility. The age of the fowl is over 7 months and will weight 1kg (2lb) and over. The best cooking method for a fowl is to stew or braise.


DUCK

Duck is one of my favorite types of poultry due to its exquisite fat and excellent texture. If you’ve never had duck before, I implore you to try it. There is nothing game-y about duck and it goes very well with a variety of sweet berry sauces, making it even more delicious. The most common type of duck used is a young duckling. It only contains dark meat and large amounts of fat and to make the fatty skin edible, you must render as much fat off the meat as possible. Duck has a high percentage of bone and fat to meat and a 2 Kg duck will only feed 2 people while a chicken of the same weight will serve 4. Duck can be eaten medium-well to medium and there is no danger of foodborne illness.


GOOSE

A goose contains only dark meat and has very fatty skin. It is usually roasted at high temperatures to render the fat. Roasted goose is popular at holidays and is often served with an acidic fruit-based sauce to offset the fattiness.


PIGEON

Not as common as many of the other types of poultry out there, and in fact most of these types you’ll have to actively seek out, however, the pigeon does have roots in history where it was an important part of a diet. The young pigeon is not the pigeon you find on the streets but rather raised for the purpose of being eaten. Usually referred to as squad, its meat is dark and tender, suitable for broiling, sauteing or roasting. There is minimal amounts of fat on the pigeon.


TURKEY

We all know about turkey and we should all know the differences in cooking a turkey compared to cooking a chicken. The difference in size alone means that the cooking methods and cooking times change substantially. Turkey is the second most popular types of poultry. It has both light and dark meat and a relatively small amount of fat. Younger turkeys are much more economical and can be prepared in almost any manner. Best cooking methods for the typical young turkey is roast or cut into cutlets and sauteed or pan-fried.

RHINOCEROSES

RHINOCEROSES



* The rhinoceros is a large mammal native to Africa and Asia. There are five species of rhino found in the world with 3 out of the 5 species of rhino now considered to be critically endangered. The rhino is thought to be the second biggest land mammal in the world behind the African elephant.


* Rhinoceroses are characterized by the possession of one or two horns  on the upper surface of the snout; these horns are not true horns but are composed of keratin, a fibrous protein found in hair.

* Modern rhinoceroses are large animals, ranging from 2.5 metres (8 feet) long and 1.5 metres (5 feet) high at the shoulder in the Sumatran rhinoceros  to about 4 metres (13 feet) long and nearly 2 metres (7 feet) high in the white rhinoceros.

* Adults of larger species weigh 3–5 tons. Rhinoceroses are noted for their thick skin, which forms platelike folds, especially at the shoulders and thighs. All rhinos are gray or brown in colour, including the white rhinoceros, which tends to be paler than the others.

* Aside from the Sumatran rhinoceros, they are nearly or completely hairless, except for the tail tip and ear fringes, but some fossil species were covered with dense fur. The feet of the modern species have three short toes, tipped with broad, blunt nails.

BELL PEPPER

BELL PEPPER



Health Benefits of Bell Peppers

Perhaps it's the intense color variety, or maybe it's the flavor that gives it away, but bell peppers have more than their share of vitamins and minerals. Regular consumption of foods rich in vitamin C, like green peppers, for instance, which contain more than twice the vitamin C of an orange, helps protect against scurvy, boosts the immune system, lowers inflammation in the arteries that leads to heart disease, diabetes, and cholesterol build up, and scavenges harmful free radicals from the body. Other nutritional benefits of bell peppers include thiamin, niacin, folate, magnesium, and copper.

Bell pepper, also called sweet pepper or capsicum, pepper cultivar in the nightshade family, grown for its thick, mild fruits. Bell peppers are used in salads and in cooked dishes and are high in vitamin A and vitamin C. The large furrowed fruits are technically berries  and can be green, red, yellow, or orange. Bell pepper plants are grown as annuals, and the green varieties are harvested before the appearance of red or yellow pigment—generally about 60–80 days after transplanting.

Scavengers

SCAVENGERS

A scavenger is an organism that mostly consumes decaying biomass, such as meat or rotting plant material. Many scavengers  are a type of carnivore, which is an organism that eats meat.

Omnivores

OMNIVORES

Omnivores are animals that eat both plant- and animal-derived food. In Latin, omnivore means to eat everything. Humans, bears (shown in Figure 3a), and chickens are example of vertebrate omnivores; invertebrate omnivores include cockroaches and crayfish

Herbivores

HERBIVORES

Herbivores are animals whose primary food source is plant-based. Examples of herbivores, as shown in Figure 1 include vertebrates like deer, koalas, and some bird species, as well as invertebrates such as crickets and caterpillars. These animals have evolved digestive systems capable of handling large amounts of plant material. Herbivores can be further classified into frugivores (fruit-eaters), granivores (seed eaters), nectivores (nectar feeders), and folivores (leaf eaters).

Carnivores

CARNIVORES

Carnivores are animals that eat other animals. The word carnivore is derived from Latin and literally means “meat eater.” Wild cats such as lions, and tigers are examples of vertebrate carnivores, as are snakes and sharks, while invertebrate carnivores include sea stars, spiders, and ladybugs . Obligate carnivores are those that rely entirely on animal flesh to obtain their nutrients; examples of obligate carnivores are members of the cat family, such as lions and cheetahs. Facultative carnivores are those that also eat non-animal food in addition to animal food. Note that there is no clear line that differentiates facultative carnivores from omnivores; dogs would be considered facultative carnivores.

Milk Content

Milk Content



The fat content of milk is the proportion of milk, by weight, made up by butterfat. The fat content, particularly of cow's milk, is modified to make a variety of products. The fat content of milk is usually stated on the container, and the color of the label or milk bottle top varied to enable quick recognition.


Milk fat percentages

Cow breed - Approximate percentage

Jersey - 5.2
Zebu - 4.7
Brown Swiss - 4.0
Holstein-Friesian - 3.6




Nutrition Facts: Milk, whole, 3.25% fat - 100 grams

Calories 61
Water 88 %
Protein 3.2 g
Carbs 4.8 g
Sugar 5.1 g
Fiber 0 g
Fat 3.3 g
Saturated 1.87 g
Monounsaturated 0.81 g
Polyunsaturated 0.2 g
Omega-3 0.08 g
Omega-6 0.12 g
Trans fat ~




Vitamins and Minerals

Milk contains all the vitamins and minerals necessary to sustain growth and development in the young calf during its first months of life.

It also contains almost every single nutrient needed by humans, making it one of the most nutritious foods on the planet.

The following vitamins and minerals are found in particularly large amounts in milk:

* Vitamin B12: This essential vitamin is only found in foods of animal origin , and milk is very high in B12.

* Calcium: Milk is not only one of the best dietary sources of calcium, but the calcium found in milk is also easily absorbed.

* Riboflavin: One of the B-vitamins, also called vitamin B2. Dairy products are the biggest source of riboflavin in the Western diet.

* Phosphorus: Dairy products are a good source of phosphorus, a mineral that plays an essential role in many biological processes.

Thursday, November 29, 2018

Canned Food

What Is Canned Food?




Canning is a method used to preserve foods for long periods of time by packing them in airtight containers.

Canning was first developed in the late 18th century as a way to provide a stable food source for soldiers and sailors at war.

The canning process can vary slightly from one product to another, but there are three main steps. These include:

Processing: Food is peeled, sliced, chopped, pitted, boned, shelled or cooked.

Sealing: The processed food is sealed in cans.

Heating: Cans are heated to kill harmful bacteria and prevent spoiling.

This allows food to be shelf-stable and safe to eat for 1 to 5 years or longer.

Common canned foods include fruits, vegetables, beans, soups, meats and seafood.



They May Contain Deadly Bacteria


While it's extremely rare, canned foods that weren't processed properly may contain dangerous bacteria known as Clostridium botulinum.

Consuming contaminated food can cause botulism, a serious illness that can lead to paralysis and death if left untreated.

Most cases of botulism come from foods that have not been canned properly at home. Botulism from commercially canned food is rare.

It's important to never eat from cans that are bulging, dented, cracked or leaking.



Drug Addiction

What Is Drug Addiction?



Drug addiction is a complex neurobiological disease that requires integrated treatment of the mind, body, and spirit. It is considered a brain disease because drugs change the brain — they change its structure and how it works. Without treatment, these brain changes can be long-lasting. Addiction is chronic, it is progressive, and if left untreated, it can be fatal.

Individuals struggling with drug addiction often feel as though they cannot function normally without their drug of choice. This can lead to a wide range of issues that impact professional goals, personal relationships, and overall health. Over time, these serious side effects can be progressive, and if left untreated, fatal.



Commonly Used Illegal Drugs


Drugs are classified in a number of ways. Many are potentially addictive and harmful. Examples of illegal drugs include:

# Heroin

# Cocaine or crack cocaine

# Methamphetamine

# Bath Salts

# Methadone

# Ecstasy

# Marijuana

# LSD

# Mushrooms

# PCP



Commonly Used Prescription Drugs


Prescription drugs which can be obtained legally are also used by all age groups for non-medical reasons, often in combination with alcohol. The risks of drug interaction or accidental overdose can be deadly. Commonly used and misused prescription drugs include:

* Opioid painkillers

* Benzodiazepines

* Stimulants, such as those used to treat ADHD

* Antidepressants

* Anti-obsessive agents

* Mood stabilizers

* Alcohol is a Drug

One of the most common misconceptions is that alcohol is not a drug. Though legal, alcohol is a mind-altering substance. When taken in combination with other drugs, the effects can be deadly. To learn more about alcoholism, visit us here.



Warning Signs of Drug Addiction


Sometimes the warning signs of alcohol misuse or abuse are very noticeable. Other times, they can take longer to surface. When drug addiction is discovered in its early stages, the chance for a successful recovery increases significantly.
Common signs of drug addiction include:

+ Loss of control

+ Continued problems despite negative consequences

+ Spending less time on activities that used to be important, such as hanging out with family and friends, exercising, or pursuing hobbies or other interests

+ Drop in attendance and performance at work or school

+ Taking serious risks in order to obtain one’s drug of choice

+ Acting out in personal relationships, particularly if someone is attempting to address their substance problems

+ Going out of one’s way to hide the amount of drugs taken

+ Serious changes or deterioration in hygiene or physical appearance

+ Needing to use more and more of the drug in order to produce the same effect

+ Withdrawal symptoms such as shakiness, trembling, sweating, nausea or fatigue


If you feel as though drug addiction is taking a toll on your life, it’s important to find quality treatment that can help you overcome addiction.



Drug Addiction Can Result in Overdose


Any drug overdose can be either accidental or intentional. Drug overdoses are the leading cause of death for Americans under 50. Accidental overdoses tend to happen when people take more of a prescription medication than originally intended to achieve certain results, or when they use too much of an illegal drug trying to get a better high. Intentional overdoses are usually a result of someone trying to commit suicide. Regardless of the intent, any loss of life due to an overdose is tragic and any overdose can have severe and lasting repercussions.

Drug Addiction Affects Every Organ in the Body
Aside from overdose, there are many adverse medical effects of drug addiction. These include:

- Cardiovascular disease

- Contraction of HIV, hepatitis and other illnesses

- Heart rate irregularities, heart attack
Respiratory problems such as lung cancer, emphysema, and breathing problems

- Abdominal pain, vomiting, constipation, diarrhea

- Kidney and liver damage

- Seizures, stroke, brain damage

- hanges in appetite, body temperature, and sleeping patterns

- Stroke

- Pancreatitis

- Gastrointestinal problems

- Malnutrition

- Insomnia and sleep disorders



Integrated Treatment Is Key to Treating Drug Addiction


Integrated treatment is comprehensive programming that offers all of the therapeutic resources necessary to help the individual heal physically, mentally, psychologically, and spiritually. There is no one cause of addiction, though living with a mental health disorder may increase the likelihood of developing a substance use disorder — and vice versa. Everyone is different. In some cases, a mental health disorder predates the development of a drug abuse. In other cases, mental health symptoms are not apparent until after addiction has taken hold — sometimes, these conditions are exacerbated or worsened by drug use.

Wednesday, November 28, 2018

Are cookies as addictive

Are cookies as addictive ?



A cookie is a baked or cooked food that is small, flat and sweet. It usually contains flour, sugar and some type of oil or fat. It may include other ingredients such as raisins, oats, chocolate chips, nuts, etc.


MERITS


Nutritive Value

Cookies are considered to be a very high protein snack and the best part is that it is very tasty. There are no artificial sweeteners, preservatives and colours. So, this is safe for children as well. There is good for people with lifestyle based disorders including diabetes and obesity. The risk of any cardiovascular diseases can also be reduced to a great extent.
 

Protein Rich

One of the health benefits of cookies is its rich protein content. Metabolism works on converting these materials into energy. So, when you feel you are lacking proteins in your diet, a cookie is sure to make up for it. Protein does a great job for developing new tissue and muscles.


Gluten Free

When you are looking at the health benefits of cookies, the next thing you should know is that they are gluten free. Gluten is a substance which is commonly found in wheat and in oats. So, for those who are allergic to it will not be able to consume foods with gluten. At the same time, cookies have no gluten and are safe to eat.



DEMERITS


Fats found in some biscuits, cakes and processed foods could have a harmful effect on memory, researchers have warned.

The fats, known as trans fats, are used both in processed food and in restaurants, often to improve the texture, shelf life or flavour.

They are created when hydrogen is added to vegetable oil to make it more solid, which is why they are often called partially hydrogenated oils.

Ice cream to human health

Is ice cream good for health ?


Photo:- google

A Source of Energy


Although the nutritional content of ice cream varies among brands and types, in general it is an excellent source of energy. Ice cream is rich in carbohydrate, with about 15 grams in a one-half-cup serving. A serving also contains about 7 grams of fat and 2 grams of protein, making it an energy-dense food. According to the U.S. Department of Agriculture, one-half cup of vanilla ice cream provides 137 kilocalories of energy, about twice the amount in one-half cup of whole milk. Ice cream is a good choice when you need energy or if you are pursuing a program to gain weight.


A Good Source of Minerals


Ice cream is also a dietary source of two important minerals. It is particularly rich in calcium and phosphorus, with about 10 percent of the adult recommended dietary allowance, or RDA, of these minerals in a single, one-half-cup serving. Both calcium and phosphorus promote strong, healthy bones. In fact, consuming plenty of calcium, but not phosphorus, wouldn't do your bones much good. While good amounts of these nutrients don't make ice cream a health food, you can consider them a modest perk when you do indulge.


Fat and Sugar Content


Ice cream is a high-fat food, since it must contain greater than 10 percent milk fat to be designated ice cream, with some products having as much as 16 percent, according to the University of Guelph. Milk fat is largely cholesterol, a saturated fat. When your blood cholesterol level is too high, it can build up as plaque, a fatty deposit in your arteries that interferes with blood flow and raises your risk of heart disease and stroke. Ice cream is also high in sugar, which makes up the majority of its carbohydrate content. The Mayo Clinic website warns that consumption of too much sugar may contribute to health problems such as weight gain, cavities and increased levels of blood triglycerides, another unhealthy type of fat. To lower your risk for high cholesterol and sugar-related problems, consume ice cream in moderation or choose a low-fat, low-sugar ice cream substitute.


Lactose Content


Ice cream may cause problems for certain people because it is dairy-based and contains lactose, a milk sugar. These individuals, referred to as lactose-intolerant, are deficient in lactase, the enzyme needed to digest lactose, and may experience digestive upset if they consume ice cream. According to PubMed Health, about 30 million Americans are lactose-intolerant. If you are lactose-intolerant, taking a lactase supplement when consuming ice cream may alleviate this problem, or you can replace ice cream with a similar frozen product made with soy milk or another dairy substitute.

Merits and demerits of packet milk

Is packet milk good for our health ?




Milk is a precious element for our our body  and important for our body’s growth but Milk seems to have a problem of reducing calcium in bones. Seeds have a much bigger amount of calcium as compared to milk and is totally healthy for consumption.

In earlier times most of the people where doing dairy farming. So there was chances to get fresh milk from cow. Now situation is changed. Peoples are doing different kinds of business. People’s interest in diary farming is reduced. Packet milk must be boiled well before drinking. Then it is good for health otherwise packet milk is not good for our health.


Pasteurization

Pasteurization was developed by Louis Pasteur in 1864. Pasteurization destroys microoganisms that can appear in milk and cause illnesses, such as tuberculosis, typhoid fever, scarlet fever, sore throat, diptheria and gastrointestinal ailments. It's also meant to counter organisms that lead to the souring of milk. The process involves heating the milk to temperatures between 150 to 300 degrees Fahrenheit and then cooling it. Pasteurization kills dangerous germs, but it also destroys beneficial bacteria and other nutritious constituents.



List of Pros of Pasteurized Milk

1. Lower Risk of Sickness

With pasteurized milk, you can rest easier knowing that you’re consuming milk that is devoid of most contaminants that would make people sick. This is very important to know because as most people wouldn’t know, it’s something that can cause a lot of headaches, both literal and figurative, assuming you’re not consuming pasteurized milk. By erring on the side of caution, you’ll be drinking healthier milk by making sure it’s pasteurized milk.

2. More Nutrients

With non-pasteurized milk, you’re not getting the same level of nutrients that you would otherwise have in other kinds of milk. This makes it very unique and ensures that you won’t have to worry about any serious health issues. When it comes to other kinds of milk, there is a whole host of other issues that could pop up. This means that if you’re someone that is very concerned about getting the right amount of added nutrients, make sure you’re drinking pasteurized milk.



List of Cons of Pasteurized Milk

1. Lack of Naturally-Occurring Nutrients

Yes, it might sound paradoxical that pasteurized milk would have fewer nutrients, but the truth is that pasteurized milk has fortified minerals rather than naturally-occurring ones. This can be a problem because most fortified minerals and nutrients aren’t as bioavailable as the naturally-occurring counterparts. So sure, you might be getting good-tasting milk, but it isn’t providing the same level of benefits.

2. Hormones and Added Contaminants

Ultra-pasteurized milk often features lots of hormones and other synthetic byproducts. While many of these have no known side effects, we as humans haven’t been consuming them for very long. So the jury is still out on whether or not they’re good for us over many years.



Packaged milk v/s raw milk

Indian have always regarded milk as an absolute essential of the daily diet. It is actually one of the few things where our per capita consumption is higher than the world average. So its natural that merits of Raw Milk vs Packaged milk is a topic of debate for us. Modern life has made it difficult to buy Raw Milk as its typically sold by local farmers  and thus to ensure purity one has to go to the farm personally everyday which is just not feasible nowadays. Still many parents opt for Raw Milk for young kids as it is generally thought to be higher in nutritional value. Many local vendors have come up who claim to supply direct from farm to the door-step, but how genuine and safe are they?

A lot of them don’t have the necessary licenses from FSSAI and thus the farm conditions are not regulated. This means there is always a chance of contamination (we are not talking just addition of water). Raw milk from can be contaminated in many ways. The major threats are pathogens like Salmonella, Listeria, Yersinia, Campylobacter, Staphylococcus, Mycobacterium bovis, Coxiella burnetii, Brucella, and E. coli. They can cause disease which can be fatal, especially since milk is a major food for children. The immune system of children is developing and these pathogens in milk can become a major health hazard. While boiling the milk kills many of them some of them are hardy.

Packet milk on the other hand is heavily regulated and thus undergoes a lot of safety checks and processes like pasteurization. Pasteurization is a simple process in which milk is heated to around 160º F for 15 seconds. This simple process makes the milk safe for drinking or any other use. With the advent of the organic revolution, the processing of milk is also being questioned. Pasteurization breaks the natural big fat particles in raw milk into smaller ones.  According to a recent research big fat molecules are better source of fat. They are good for the digestive system. Also some of the nutrients of milk are reduced coz of practices like UHT (ultra high temperature pasteurized). Yes this is true. Raw milk has been proven to have more calcium and minerals when compared to treated milk. Heating milk can also destroy some useful bacteria present in raw milk.

Recently a lot of companies have delved into setting-up high-tech farms, employing organic practices, packaging, and branding Raw Milk. These are generally on the expensive side but are gaining popularity coz of the promise of purity, hygiene, and zero processing. Some of the leading brands in this segment are Pride of Cow, Sarda Farms and Provilac. One key thing for all the players is to maintain the cold chain till the door of the customer as 4ºC is required for raw milk otherwise it starts to degenerate. This can prove to be a solution for the health conscious looking for purity over price.


ORCA

ORCA


Orcas, or killer whales, are the largest of the dolphins and one of the world's most powerful predators. They feast on marine mammals such as seals, sea lions, and even whales, employing teeth that can be four inches long. They are known to grab seals right off the ice. They also eat fish, squid, and seabirds.


Classification:

The orca is the apex predator of the sea and the largest member of the dolphin family. It is highly intelligent, highly adaptable and able to communicate and coordinate hunting tactics. Not typically a migratory species, orca ‘migrations' are principally in response to changes in favoured prey abundance and can sometimes be long, e.g between Alaska and California. Depending on the type of social group and location, orcas will hunt fish, squid, seals, sea lions, seabirds and even whales much larger than themselves. There has never been a documented attack on a human in the wild, and there are some stories of orcas actually protecting humans at sea from sharks. The taxonomy of this genus however is clearly in need of review, and it is likely that Orcinus orca will be split into a number of different species or at least subspecies over the next few years.

resident's versus transients.
A resident pod is less aggressive and tends to prefer fish. Transient pods act much like wolf packs and are much more aggressive. They hunt marine mammals by working together.

Appearance:

The orca, also known as a killer whale, is distinctive in appearance with a large black body, a white underside, a white patch above and behind the eye, and a grey 'saddle patch' behind the dorsal fin

At up to nearly 10 metres long, male orcas are larger than females and have a tall dorsal fin - up to nearly 2 metres in height. The tall sword-shaped and strikingly visible dorsal fin makes them almost unmistakable at sea. Female length is about 20% less and the curved dorsal fin is less than half the height of the males. Look out for orcas at OrcaLab in British Columbia (which WDC helps to fund) in the video below. You may also see humpback whales, Dall's porpoises and Pacific white-sided dolphins.


Behaviour:


Orcas are extremely fast swimmers and have been recorded at speeds of up to 54km/h. Most studies have centred around the Pacific Northwest where three distinct ecotypes exist: coastal fish-eaters (‘residents'); marine mammal eaters (‘transients') and ‘offshores' – whose dietary habits are unknown. One striking feature of the ‘resident' orcas in this area is that no apparent dispersal or immigration of birth group has been recorded in 30 years of study, making them one big family group.

A ten-year study in Kamchatka has identified two separate ecotypes of fish-eaters and transients. In Antarctica three ecotypes are recognised with more pronounced morphological and biological differences. Various specialised hunting techniques have been observed. Off Peninsula Valdes, Argentina, and the Crozet Islands, orcas feed on South American sea lions and Southern elephant seals in shallow water, even beaching themselves temporarily. Adult killer whales have been observed to teach the younger ones the skills of hunting in shallow water. Another technique for capturing seals is known as wave-hunting: killer whales spy-hop to locate seals resting on ice floes and then create waves by swimming together in groups. As the water washes over the floe, it makes the seal slide into the water where an orca waits to kill it.

DEER

DEER

(All photos collected from Google)

Deer are the hoofed ruminant mammals forming the family Cervidae. The two main groups are the Cervinae, including the muntjac, the elk, the fallow deer and the chital, and the Capreolinae, including the reindeer, the roe deer and the moose.



TYPE OF DEER

1. Arctic and Subarctic Deer: Moose, elks and reindeer

2. Deer of Europe: Fallow and roe deer

3. Deer of Asia: Barasingha, sambar, muntjac, tufted deer and water deer

4. Cervus: Red and sika deer

5. Deer of North America: Mule deer and white-tailed deer

6. Deer of South America: Marsh deer, pudús and tarucas



MOOSE


Moose, the largest member of the deer family Cervidae. Moose are striking in appearance because of their towering size, black colour, long legs, pendulous muzzle, and dangling hairy dewlap (called a bell) and the immense, wide, flat antlers  of old bulls.


ELK


Elk range in forest and forest-edge habitat, feeding on grasses, plants, leaves, and bark. Male elk have large antlers which are shed each year. Males also engage in ritualized mating behaviors during the rut, including posturing, antler wrestling (sparring), and bugling, a loud series of vocalizations that establishes dominance over other males and attracts females.


REINDEER


Reindeer, in North America called caribou, species of deer (family Cervidae) found in the Arctic tundra and adjacent boreal forests of Greenland, Scandinavia, Russia, Alaska, and Canada. Reindeer have been domesticated in Europe. There are two varieties, or ecotypes: tundra reindeer and forest (or woodland) reindeer. Tundra reindeer migrate  between tundra and forest in huge herds numbering up to half a million in an annual cycle covering as much as 5,000 km (3,000 miles). Forest reindeer are much less numerous.


FALLOW DEER


Fallow deer, medium-sized deer of the family Cervidae that is frequently kept on estates, in parks, and in zoos. The common fallow deer is native to the eastern Mediterranean; a second, larger, more brightly coloured, short-antlered form, the Mesopotamian fallow deer , is native to Iran. The common fallow deer has been introduced in many areas ever since the Neolithic Period (New Stone Age), and it now occurs wild in Europe and elsewhere and in captivity on deer farms around the world.


ROE DEER


The roe deer , also known as the western roe deer, chevreuil, or simply roe deer or roe, is a species of deer. The male of the species is sometimes referred to as a roebuck. The roe deer is relatively small, reddish and grey-brown, and well-adapted to cold environments.


BARASINGHA


The barasingha, also called swamp deer, is a deer species distributed in the Indian subcontinent. Populations in northern and central India are fragmented, and two isolated populations occur in southwestern Nepal. It is extinct in Pakistan and Bangladesh.


SAMBAR


The sambar is a large deer  native to the Indian subcontinent, southern China, and Southeast Asia that is listed as Vulnerable on the IUCN Red List since 2008. Populations have declined substantially due to severe hunting, insurgency, and industrial exploitation of habitat.


MUNTJAC


Muntjacs, also known as barking deer and Mastreani deer, are small deer of the genus Muntiacus. Muntjacs are thought to have begun appearing 15–35 million years ago, with remains found in Miocene deposits in France, Germany and Poland.


TUFTED


The tufted deer is a small species of deer characterized by a prominent tuft of black hair on its forehead and fang-like canines for the males. It is a close relative of the muntjac, living somewhat further north over a wide area of central China northeastern Myanmar.


WATER


The water deer is a small deer superficially more similar to a musk deer than a true deer. Native to China and Korea, there are two subspecies: the Chinese water deer and the Korean water deer.


RED


The red deer is one of the largest deer species. The red deer inhabits most of Europe, the Caucasus Mountains region, Asia Minor, Iran, parts of western Asia, and central Asia.


SIKA


The sika deer also known as the spotted deer or the Japanese deer, is a species of deer native to much of East Asia, and introduced to various other parts of the world.


MULE


The mule deer is a deer indigenous to western North America; it is named for its ears, which are large like those of the mule. The several subspecies include the black-tailed deer.


WHITE TAILED


The white-tailed deer, also known as the whitetail or Virginia deer, is a medium-sized deer native to the United States, Canada, Mexico, Central America, and South America as far south as Peru and Bolivia.


MARSH


The marsh deer is the largest deer species from South America reaching a length of 2 m and a shoulder height of 1.2 m. It is found in Argentina, Bolivia, Peru, Brazil, Uruguay and Paraguay.


PUDUS


The pudús are two species of South American deer from the genus Pudu, and are the world's smallest deer. The name is a loanword from Mapudungun, the language of the indigenous Mapuche people of central Chile and south-western Argentina.


TARUCA


The taruca, or north Andean deer, is a species of deer native to South America.

Wednesday, November 21, 2018

PROCESS OF BIRTH

PROCESS OF BIRTH



The emergence of a baby or other young from the body of its mother; the start of life as a physically separate being.



The Main Steps Before Birth

(According to a deep study by a researcher)


Step 1: Sperm and Egg Development

Females are born with 1 to 2 million immature eggs, about 400 of which are released over the course of her reproductive years, beginning with menarche  and ending with menopause.She will not produce any more eggs during her lifetime. On the other hand, males are not born with pre-made sperm. Instead, they are constantly producing millions of sperm cells throughout their lifetime.

Sperm Development

Sperm development begins in a male’s testicles, which are glands in the scrotal sac  located beneath the penis. The testicles hang outside of the male’s body in order to regulate scrotal temperature, as healthy sperm is produced at 94 degrees Fahrenheit, which is about 4 degrees cooler than body temperature. It takes 64 to 72 days to create a new sperm cell, and due to the fact that about 100 to 300 million sperm cells are released with each ejaculation, a male is continuously producing sperm. Once the sperm cells are produced, they are stored in the epididymis. Just prior to ejaculation, the sperm cells are mixed with semen. The liquid portion of semen aids the sperm by providing it with nourishment, protection from the acidic vaginal canal, and direction by coagulating in the female’s vagina to form a barrier. This protection only lasts about 30 minutes before the semen returns to liquid form and any sperm that has not made it through the female’s cervix dribbles out of the female’s vagina.

Egg Development

The development of a female’s egg is much more complex than sperm production. As previously stated, a female is born with all of her eggs. These millions of immature eggs are contained in follicles  (small, fluid-filled cysts), which are stored in the female’s ovaries (two almond-shaped structures on either side of the uterus).  Approximately once every month, the female’s hypothalamus sends a signal to the pituitary gland to release follicle-stimulating hormone (FSH), which prompts several follicles to develop into mature eggs. Only one of these several follicles will mature completely, with the others reabsorbing into the body.



Step 2: Ovulation

Once one egg has completely matured, it erupts from the follicle and pushes through the wall of the ovary. This process is called ovulation. The follicle of the mature egg develops into the corpus luteum, which releases a luteinizing hormone that helps thicken the lining of the female’s uterus. The follicle then sends out signals for increased estrogen  production, which indicate to the body that an egg is mature. Sometimes, though rare, more than one egg is released from a female’s ovaries within 24 hours. Fraternal twins can be the result of two released eggs becoming fertilized.
Some females can feel a slight ache on one side of their lower abdomen during ovulation. Depending on which side the ache is coming from, these females can determine which of the two ovaries produced a mature egg. It is also possible for some females to track when they are ovulating by observing changes in their cervical secretions, which become stretchy, clear, and thin before and during ovulation. Other possible identifying effects of ovulation are temperature changes, increased sex drive, light spotting, bloating, and heightened senses of taste or smell.

Each ovary is attached to the uterus by a 4-inch-long, half-inch-wide canal called a fallopian tube. After the egg is released, it is picked up by the fimbriated (finger-like) end of the fallopian tube and stays in the tube for 24 hours waiting for a single sperm to fertilize it. Tiny hairs called cilia help the egg travel through the fallopian tube towards the uterus. During the egg’s several day journey through the fallopian tube, the follicle that originally formed the egg releases signals causing the uterus to form an internal lining called the endometrium. This endometrium is full of blood and nutrients necessary to house and nurture an egg if it becomes fertilized.

If there is no sperm to fertilize the egg, the egg will move through the uterus and disintegrate, the female’s estrogen and progesterone hormone levels will return to normal, the female’s body will shed the thick endometrium lining of the uterus, and the female’s period (menstruation) will begin.



Step 3: Fertilization

Many factors need to line up in order for fertilization, or the joining of a male’s sperm cell and a female’s egg, to occur. These factors include favorable environmental conditions, timing in the female’s menstrual cycle, fertility of the male’s semen, ability of the male’s sperm cells to penetrate the egg (also known as sperm capacitation), and development of the embryo. If all of these factors are present, fertilization between sperm and egg will most likely occur.



Step 4: Implantation

By the time the fertilized egg reaches the uterus, it is a cluster of about 100 cells, and it forms a blastocyst. The blastocyst is a hollow structure, with the cells on the inside continuing to develop. At this point, it has been about 5 to 7 days since the sperm fertilized the egg. These developing cells in the blastocyst will eventually become the fetus, and the outer wall of the blastocyst will develop into the placenta and other tissues that will provide important nutrients for the growing fetus.

After another day, the embryo then emerges from its membrane (the zona pellucida) and begins the process of implanting in the female’s uterus. When the blastocyst comes into contact with the endometrium lining of the uterus, hormones will be exchanged allowing the blastocyst to connect to the uterine wall. Simultaneously, the lining of the uterus gets thicker, and the cervix is closed off with a mucus plug that will stay in place until the end of the pregnancy term. Around the time of implantation, some females may notice spotting (light bleeding), which should only last about 48 hours.

In the coming weeks and months, the cells will continue to divide and exponential cell growth will occur. These cells will be very specialized and different, and within approximately 3 weeks the first nerve cells will develop.

Please note that irregularities may cause an embryo to implant somewhere other than the female’s uterus, such as in one of the fallopian tubes. This irregularity is called an ectopic pregnancy and it can be very dangerous. In these cases, the female will either need to take medication to stop the embryo from growing, or have surgery to prevent the fallopian tube from rupturing.



Step 5: Detection

Naturally, about half of all fertilized eggs are lost before a female even knows that she is pregnant. This loss could be due to many reasons, including the blastocyst implanting but not growing, or the blastocyst growing but ceasing development.

After implantation occurs, a hormone called human chorionic gonadotropin (hCG) is present in the female’s blood.6 After about 3 to 4 weeks from the first day of the female’s last period, there are high enough levels of this hormone to be detected by pregnancy tests. It may be a few weeks until the female misses a period and even suspects that she may be pregnant.



The 3 Stages of Birth


* The most common way of childbirth is a vaginal delivery.

* It involves three stages of labour: the shortening and opening of the cervix, descent and birth of the baby, and the delivery of the placenta.

* The first stage typically lasts twelve to nineteen hours

* The second stage twenty minutes to two hours

* The third stage five to thirty minutes.

* The first stage begins with crampy abdominal or back pains that last around half a minute and occur every ten to thirty minutes. The crampy pains become stronger and closer together over time.

* During the second stage pushing with contractions may occur.

* In the third stage delayed clamping of the umbilical cord is generally recommended.

* A number of methods can help with pain such as relaxation techniques, opioids, and spinal blocks.


BLOOD VESSELS

BLOOD VESSELS

If we took all the blood vessels out of an average child and laid them out in one line, the line would stretch over 60,000  miles. An adult's would be closer to 100,000 miles long. There are three kinds of blood vessels: arteries, veins, and capillaries.



There are four main types of blood vessels:

1. Arteries

Arteries are elastic vessels that transport blood away from the heart. Pulmonary arteries carry blood from the heart to the lungs where oxygen is picked up by red blood cells. Systemic arteries deliver blood to the rest of the body.

2. Veins

Veins are elastic vessels that transport blood to the heart. Veins can be categorized into four main types: pulmonary, systemic, superficial, and deep veins.

3. Capillaries

Capillaries are extremely small vessels located within the tissues of the body that transport blood from the arteries to the veins. Fluid and gas exchange between capillaries and body tissues takes place at capillary beds.

4. Sinusoids

Sinusoids are extremely small vessels located within the liver, spleen, and bone marrow.



Function

Blood vessels function to transport blood. In general, arteries and arterioles transport oxygenated blood from the lungs to the body and its organs, and veins and venules transport deoxygenated blood from the body to the lungs. Blood vessels also circulate blood throughout the circulatory system Oxygen (bound to hemoglobin in red blood cells) is the most critical nutrient carried by the blood. In all arteries apart from the pulmonary artery, hemoglobin is highly saturated (95–100%) with oxygen. In all veins apart from the pulmonary vein, the saturation of hemoglobin is about 75%. (The values are reversed in the pulmonary circulation.) In addition to carrying oxygen, blood also carries hormones, waste products and nutrients for cells of the body.

Blood vessels do not actively engage in the transport of blood (they have no appreciable peristalsis). Blood is propelled through arteries and arterioles through pressure generated by the heartbeat. Blood vessels also transport red blood cells which contain the oxygen necessary for daily activities. The amount of red blood cells present in your vessels has an effect on your health. Hematocrit tests can be performed to calculate the proportion of red blood cells in your blood. Higher proportions result in conditions such as dehydration or heart disease while lower proportions could lead to anemia and long-term blood loss.


Blood vessels also transport red blood cells which contain the oxygen necessary for daily activities. The amount of red blood cells present in your vessels has an effect on your health. Hematocrit tests can be performed to calculate the proportion of red blood cells in your blood. Higher proportions result in conditions such as dehydration or heart disease while lower proportions could lead to anemia and long-term blood loss.

Permeability of the endothelium is pivotal in the release of nutrients to the tissue. It is also increased in inflammation in response to histamine, prostaglandins and interleukins, which leads to most of the symptoms of inflammation (swelling, redness, warmth and pain).

CHROMOSOME

CHROMOSOME



In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.

Chromosomes are not visible in the cell’s nucleus—not even under a microscope—when the cell is not dividing. However, the DNA that makes up chromosomes becomes more tightly packed during cell division and is then visible under a microscope. Most of what researchers know about chromosomes was learned by observing chromosomes during cell division.

Each chromosome has a constriction point called the centromere, which divides the chromosome into two sections, or “arms.” The short arm of the chromosome is labeled the “p arm.” The long arm of the chromosome is labeled the “q arm.” The location of the centromere on each chromosome gives the chromosome its characteristic shape, and can be used to help describe the location of specific genes.



 TWO CATEGORIES OF CHROMOSOMES



In human beings, there are two types of chromosomes: AUTOSOMES and ALLOSOMES (also known as sex chromosomes). There are 22 pairs of autosomes and 1 pair of allosomes in our genome (and thus in our cells), resulting in a total of 46 chromosomes. The autosome pairs are labeled 1-22 depending on their sizes in base pairs, while the allosomes are labeled by letters X and Y.

A female contains two X chromosomes  in the allosome pair, while a male  human being has X and Y chromosomes in the allosome pair. The X chromosome is present in ovum, while either X or Y chromosomes can be present in the sperm. The female allosome is represented as XX, while the male allosome is XY.

Male and female bodies contain the same 22 pairs of autosomes. 



THE FOUR MAIN TYPE OF CHROMOSOMES



1. Metacentric Chromosomes


Metacentric chromosomes have the centromere in the center, such that both sections are of equal length. Human chromosome 1 and 3 are metacentric.


2. Submetacentric Chromosomes

Submetacentric chromosomes have the centromere slightly offset from the center leading to a slight asymmetry in the length of the two sections. Human chromosomes 4 through 12 are submetacentric.


3. Acrocentric Chromosomes

Acrocentric chromosomes have a centromere which is severely offset from the center leading to one very long and one very short section. Human chromosomes 13,15, 21, and 22 are acrocentric.


4. Telocentric Chromosomes

Telocentric chromosomes have the centromere at the very end of the chromosome. Humans do not possess telocentric chromosomes but they are found in other species such as mice.




What are the Functions of Chromosomes?


Chromosomes have a unique structure that keeps the DNA in a tightly wrapped position. The DNA strands are placed around a spool-like structure of protein called the histones. If the DNA structure was not tightly wound, it would have been very difficult to accommodate the strands in the cell nucleus. The strands of DNA molecules in a single cell of humans are almost 6 feet long, if unwound. Thus, the strands being wrapped tightly help them to be placed in the tiny, microscopic cell nucleus. Functions of chromosome also includes ensuring that during cell division, the DNA is copied exactly as it is and distributed evenly after cell division. If there are any changes in the structure or number of chromosomes, it could lead to serious birth defects in the progeny. Thus, it is absolutely essential for every reproductive cell, that is the eggs and sperms, to contain the right number and correct structure of chromosomes. Failing this, it will lead to serious complications in the offspring produced.


DESERT

DESERT



A waterless, desolate area of land with little or no vegetation, typically one covered with sand.
Deserts are the driest places on Earth they get fewer than 10 inches (25 centimeters) of rain a year. Some deserts may get a lot of rain all at once. Then it might not rain again for months or even years. Approximately 1/3 of Earth's land surface is a desert.



Type of desert

There are four types of deserts:

1. Subtropical Desert

subtropical deserts are hot and dry year-round.
Eg :- Saharan and Arabian deserts

2. Costal Desert

coastal deserts have cool winters and warm summers.
Eg :- Namib Desert and the Atacama Desert

3. Cold winter Desert

 cold winter deserts have long, dry summers and low  rainfall in the winter.
Eg :- Gobi Desert in China and Mongolia

4. Polar Desert

polar deserts are cold year-round.
Eg :- Arctic and the Antarctic



SUBTROPICAL DESERT

A subtropical desert is a type of ecosystem, or biome, that is characterized by high temperatures, very low precipitation and warm soils. Plant species such as grass, shrubs and succulents can be found there. Many animals, such as camels, tortoises, birds, foxes, rodents and lizards, also live in subtropical deserts.

COSTAL DESERT

A coastal desert, the Atacama of South America, is the Earth's driest desert. In the Atacama, measurable rainfall--1 millimeter or more of rain--may occur as infrequently as once every 5-20 years. Crescent-shaped dunes are common in coastal deserts such as the Namib, Africa, with prevailing onshore winds.

COLD WINTER DESERT

Cold deserts have hot summers but extremely cold winters. These deserts are found in high, flat areas, called plateaus, or mountainous areas in temperate regions of the world. Temperate regions lie between the polar regions and the tropics. Like other types of desert, cold deserts get very little rain or snow.

POLAR DESERT

Polar deserts are the regions of the Earth that fall under an ice cap climate. Despite rainfall totals low enough to normally classify as a desert, polar deserts are distinguished from true deserts by low annual temperatures and evapotranspiration. Most polar deserts are covered in ice sheets, ice fields, or ice caps. Ice-free areas have no vegetation whatsoever.

Polar deserts are one of two polar biomes: polar deserts and Arctic tundra. They are called polar deserts because of their flat environment. These biomes are located at the poles of the earth, specifically, the Arctic, northernmost North America, Europe, Asia and Antarctica. Polar deserts are located in the Arctic and Antarctic. Unlike the tundra that can support plant and animal life in the summer, polar deserts are barren with permanent layers of ice. However, there is evidence of life in this seemingly inhospitable environment. The thick ice contains sediments of organic and inorganic substances which create a habitable environment for microbial organisms. These organisms are closely related to cyanobacteria which have a variety of functions, particularly, fixing carbon dioxide from the melting water.



Rank, Name, Type , Area (approximately km²), Area (approximately sq mi), Location

1. Antarctica, Polar, 14,000,000 , 5,500,000 , Antarctica

2. Arctic, Polar,  13,985,000 , 5,400,000 , Arctic  (Alaska, Canada, Finland, Greenland, Iceland, Norway, Russia and Sweden)

3. Sahara, Subtropical, 9,000,000+ , 3,300,000+ , North Africa  (Algeria, Chad, Egypt, Eritrea, Libya, Mali, Mauritania, Morocco, Niger, Sudan  and Tunisia)

4. Australian Desert, Subtropical, 2,700,000 , 1,000,000 , Australia

5. Arabian Desert, Subtropical, 2,330,000 , 900,000 , Western Asia  (Iraq, Jordan, Kuwait, Oman, Qatar, Saudi Arabia, United Arab Emirates and Yemen)

6. Gobi Desert, Cold Winter, 1,295,000 , 500,000 , Central Asia (China and Mongolia)

7. Kalahari Desert, Subtropical,  900,000+ , 360,000 , Southern Africa  (Angola, Botswana, Namibia and South Africa)

8. Patagonian Desert, Cold Winter, 620,000 , 200,000 , South America  (Argentina  and Chile)

9. Syrian Desert, Subtropical, 520,000+ , 200,000 , Western Asia  (Iraq, Jordan, and Syria)

10. Great Basin, Cold Winter, 492,000+ , 190,000 , United States

11. Chihuahuan Desert, Subtropical, 450,000+ , 175,000 , North America  (Mexico and the United States)

12. Karakum Desert, Cold Winter, 350,000+ , 135,000 , Turkmenistan

13. Colorado Plateau, Cold Winter, 337,000+ , 130,000 , United States

14. Sonoran Desert, Subtropical, 310,000+ , 120,000 , North America  (Mexico and the United States)

15. Kyzylkum Desert, Cold Winter, 300,000+ , 115,000 , Central Asia  (Kazakhstan, Turkmenistan  and Uzbekistan)

16. Taklamakan Desert, Cold Winter, 270,000 , 105,000 , China

17. Thar Desert , Subtropical, 200,000+ , 77,000 , South Asia  (India and Pakistan)

18. Dasht-e Margo, Subtropical, 150,000 , 58,000 , Afghanistan

19. Registan Desert, Subtropical, 146,000 , 56,400 , Afghanistan

20. Atacama Desert, Mild Coastal, 140,000+ , 54,000 , South America  (Chile and Peru)

21. Mojave Desert, Subtropical, 124,000+ , 48,000 , United States

22. Columbia Basin, Cold Winter, 83,100+ , 32,100 , United States

23. Namib Desert, Coastal, 81,000+ , 31,000 , Southern Africa  (Angola and Namibia)

24. Dasht-e Kavir, Subtropical, 77,000+ , 30,000 , Iran

25. Dasht-e Loot, Subtropical, 52,000+ , 20,100 , Iran



MANGROVE

MANGROVE



Mangrove forests thrive near the mouths of large rivers where river deltas provide lots of sediment (sand and mud). Mangrove roots collect sediments and slow the water's flow, helping to protect the coastline and preventing erosion.  Over time, the roots can collect enough debris and mud to extend the edge of the coastline further out.

Mangrove forests are teeming with life. Shorebirds, crab-eating monkeys, and fishing cats all make the mangrove home. Mangroves provide a safe haven and  a nursery for a variety of fish, birds, crustaceans, and shellfish.



The main 3 types

Of the seven types of mangroves, three are most dominant, the RED, BLACK and WHITE types. and trap oxygen for its oxygen-starved root systems. These bristles are known as pneumatophores. The Black Mangrove is tolerant of high saline conditions and the trees grow in isolated groups or woodland formations.

IRRAWADDY DOLPHIN