The angular momentum of a body moving in a circular path with velocity v is \(\overrightarrow{L}=\overrightarrow{r}×\overrightarrow{p}=\overrightarrow{r}×m\overrightarrow{v} \) i.e Lα v This means, the angular .....

They are: Thyroid gland Thymus gland It is located in the neck, below the thyroid cartilage. It is located in the upperchest. It is larger in adults than in children. It is larger in children than in .....

Antigen Antibody An antigen is a foreign particle that can create an immune response within a person's body. Antibodies are also known as immunoglobulins and these proteins are created by the body. Anitgens are .....

The two lungs are the primary sense organs of the respiratory system. The process of breathing (respiration) is divided into two distinct phases: inspiration (inhalation) and expiration (exhalation). The differences .....

The thyroid gland is a highly vascular brownish red gland located anteriorly in the lowerneck, extending from the level of the 5th cervical vertebra down to the 1st thoracic vertebra. The thyroid gland is a butterfly shaped organ consisting of two .....

Menopause is the time in all women's lives when menstrual periods stops permanently and is no longer able to get pregnant naturally. Menopause typically occurs between 45 to 55 years of age. Menopause occurs when a women has no any vaginal .....

Maintaining homeostasis often requires conditions to be limited to a narrow range. When conditions exceed the upper limit of homeostasis, a specific action, usually the production of a hormone, is triggered. When conditions return to normal, hormone .....

Artificial Respiration is defined as the process of forcing air into the lungs of a person who has stopped breathing by blowing into their mouth or nose in order to make them start breathing again. Artificial respiration can save a life whenever .....

The kidneys are responsible for maintaining homeostasis by following ways: 1. Osmolarity regulation: Osmolarity regulation means maintaining water and salt level of the body. This regulation is brought about by changing the permeability of .....

Thoracic diaphragm or simply diaphragm is sheet of internal skeletal muscle that extends across the bottom of the thoracic cavity. The diaphragm separates the thoracic cavity from the abdominal cavity. Diaphragm performs an important function in .....

The pancreas is classified as heterocrine gland because it contains both endocrine and exocrine glandular tissue. i. Exocrine part: The exocrine tissue makes up about 99% of the pancreas by weight. The exocrine tissue is arranged into small masses .....

.....

The cochlea is the main structure of the human auditory system. It is not actually an organ itself, but a bony structure in the inner ear. Structure of cochlea: Cochlea is a fluid-filled spirally coiled bony tubes about 20-30 mm long. In human, the .....

.....

The Haversian Canal system or simply Haversian system (Name after British Physician Clopton Havers, 1657-1702) or osteon is the faundamental functional unit of a compact bone comprising a Haversian Canal and its concentrically arranged lamellae, .....

The pituitary gland is called the "Master Gland" of the body because it secretes stimulating hormones which control the secretion of most of the endocrine glands of the body. Structure The pituitary gland is also known as Hypophysis and .....

Female reproductive system is made up of internal organs and external structures. Its function is to enable reproduction of the species. Sexual maturation is the process that this system undergoes in order to carry out its role in the process of .....

Each nephron in the human is a long tubule, or extremely fine tube, about 30-55 mm (1.2 -2.2 inches) long. A nephron has the following parts: 1. The Renal Corpuscle or Malpighian's Body: It is the head of the nephron and it is where urine .....

Testosterone is the male sex hormone that is important for sexual and reproductive development. Testosterone belongs to a class of male hormones called androgens, which are sometimes called steroids or anabolic steroids. In men, testosterone is .....

The heart depends on its electrical system to deliver signals and make the heartbeat normally. The heart beat is triggered by electrical impulses that travel down a special pathway through the heart. An electrical stimulus is generated by the .....

The kidneys are the chief excretory organs of the body. The function of the human kidney are listed as follows: 1. Removing wastes from the Blood: Filtering the blood is the primary function of the kidney. Everyday the kidneys process about 190 .....

Adrenal gland has two parts: adrenal cortex and adrenal medulla. These two parts secrete different hormones. 1. Hormones of Adrenal cortex: Adrenal cortex has three regions arranged in order from outer to inner: Outer zona glomerulosa, middle .....

The pancreas is the main enzyme producing accessory gland of the digestive system. It is a heterocrine gland i.e. it has both exocrine and endocrine functions. It is located in the abdominal cavity behind the stomach. It is about 15 cm long. The .....

The endocrine system is made up of a network of gland. These glands secrete hormones to regulate many bodily functions including growth and metabolism. The hormones are directly secreted into the blood stream. Hormones are the chemical substances .....

.....

The adrenal glands are a pair of endocrine glands that rest on the upper poles of the kidneys, one on each kidney. The right adrenal is pyramidal, whereas the left one is more crescentric. Due to its location, each adrenal gland is also called supra .....

The pituitary gland is called the "Master gland" of the body because it secretes stimulating hormones which control the secretion of most of the endocrine glands of the body. The role of pituitary gland is illustrated by the functions of .....

Gas exchange is the delivery of oxygen from the lungs to the blood stream, and the elimination of carbon dioxide from the blood stream to the lungs. Gas exchange is the part of respiration and is a -biological process by which gases more passively .....

.....

Neuron or nerve cell is the structural and functional unit of the nervous system. In other words, any of the impulse - conducting cells that constitute the brain, spinal cord and the nerves in vertebrates are called neurons. Each neuron has two .....

Suppose a couple of forces F acting tangentially to the rim of a wheel of radius r rotates it through an angle θ as shown in the figure. By the definition of torque, the torque τ acting on the wheel is the given by: τ = .....

Organ transplantation is medical procedure in which an organ is removed from one body and placed in the body of a recipient, to replace damaged or missing organ. Organs Transplant is needed when an organ has failed to perform because of illness or .....

Poultry farming means 'raising various types of domestic birds commercially for the purpose of meat, eggs and feather production.' The most common and widely raised poultry birds are chicken. Poultry farming business has numerous benefits .....

Surrogacy is a method of assisted reproduction where intended parents work with a gestational surrogate who will carry and care for their baby(ies) until birth. Intended parents use surrogacy to start or grow their families when they can't do so .....

Surrogate motherhood is one of many currently available forms of Assisted Reproductive Technologies (ARTs) that have developed in response to the increasing number of individuals or couples who find themselves unable to conceive a child on their .....

Rejection is defined as a process in which a transplant receipent's immune system attacks the transplanted organ or tissue. When a person receives an organ from someone else during transplant surgery, that person's immune system may .....

Fingerling is a young fish, especially less than a year old and about the size of a .....

A vaccine is a biological preparation that provides active acquired immunity to a particular disease. e.g Polio Vaccine. An injection is the introduction of a drug, vaccine, contraceptve or other therapeutic agent into the body using a needle or .....

The limitation of organ transplantation are as follows: i. Shortage of organs ii. Very expensive iii. Prolonged suffering to the recipient iv. Possible transplant rejection v. Possible surgery .....

Vaccine is a preparation of suspension or extract of dead or attenuated germs of disease which on inoculation into a healthy person provides temporary or permnanet, active or passive immunity by including antibodies formation. According to WHO, .....

Sir Alexander Fleming, a British Bacterioogist, invented the first Antibiotics, the Penicillin, in 1928 at St. Mary's Hospital in .....

Allograft is the transplant of an organ or tissue between two genetically different members of the same species. Examples are transplant of kidney, liver, cornea .....

Vaccine is a prepartion of suspension or extract of a dead or attenueted germs of a disease which on inoculation (injection) into a healthy person provides temporary or permanent active or passive immunity by inducting antibodies formation. Thus, .....

Down syndrome is a congenital disorder arising from a chromosome defect, causing intellectual impairment and physical abnormalities including short stature and a broad facial profile. It arises from a detect involving chromosomes 21, usually and .....

An antigen is a molecule capable of inducing an immune response on the part of the host organism. They cause an immune system to produce antibodies against .....

Sir Alexander Fleming, a British Bacteriologist, invented the first Antibiotics, the Penicillin, in 1928 at St. Mary's Hospital in .....

Pullets are young hens, especially one less than one year .....

They are as follows: Benign Tumor Malignant Tumor It is enclosed in the connective tissue. It is not enclosed in any specific tissue. It remains confined to the site of its origin. It is not confined to the site .....

Hypothyroidism is a condition where the thyroid gland is underactive. Thyroid gland cannot produce enough thyroid hormone and affect the whole body. Thyroid hormones regulate the metabolic activities of the body. The general effect of hypothyroidism .....

Smoking or chewing of tobacco is the number one socially significant disease worldwide. The use of tobacco has both short and long term effects. i. The short term effects of smoking are as follows: - Bad breath, bad taste in mouth, smelly hair and .....