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Mucus

Mucus, or slime, is a slippery liquid. It is made by many living things as a kind of biological lubricant. It plays the role in living things which oil plays in machines. Mucus is mainly composed of polysaccharides, which are long-chain carbohydr ...

                                               

Salivary gland

The salivary glands make saliva. Saliva keeps the mouth and other parts of the digestive system wet and slippery. It also helps break down food when you are chewing. This helps food go down the throat to the stomach. There are three main pairs of ...

                                               

Integumentary system

The integumentary system is everything covering the outside of an animals body. This account is written mostly with people in mind, but it applies more widely. The integument means skin, hair, scales, nails, sweat glands and their products sweat ...

                                               

Sebaceous gland

The sebaceous glands are microscopic glands in the skin which produce an oily/waxy substance, called sebum, to lubricate the skin and hair. In people, these glands are found in greatest amounts on the face and scalp, joined near the top inside ha ...

                                               

Sweat

Sweat, or perspiration, is a liquid made by the skin when the body is hot. Sweat is made in sweat glands under the surface of the skin. It comes out of tiny holes in the skin called pores. Sweat is mostly water, but it also contains some salts. T ...

                                               

Yaws

Yaws is a tropical infection of the skin, bones and joints. It is caused by the spirochaete bacterium Treponema pallidum pertenue. The disease begins with a round, hard swelling of the skin, two to five centimeters in diameter. The center may bre ...

                                               

Lymphatic system

In mammals, the lymphatic system is a network of thin vessels that branch, like blood vessels, into tissues throughout the body. It is part of the immune system. It is a one-way system which carries cells and fluid back to the blood system. Lymph ...

                                               

Lymphogranuloma venereum

Lymphogranuloma venereum is a chronic infection of the lymphatic system caused by three different types of the bacterium Chlamydia trachomatis. The bacteria spread through sexual contact. The infection is not caused by the same bacteria that caus ...

                                               

Spleen

The spleen is an organ in vertebrates. The spleen is part of the lymphatic system. In people, it is on the left side of the body, under the heart. The spleen helps fight infections and keeps the blood cells healthy.

                                               

Thymus

The thymus is a specialized lymphoid organ of the immune system. The thymus is in front of the heart and behind the sternum. In the thymus, T cells or T lymphocytes mature. T cells are critical to the adaptive immune system, where the body adapts ...

                                               

Astrocyte

Astrocytes are characteristic star-shaped glial cells in the brain and spinal cord. They are also known collectively as astroglia. The proportion of astrocytes in the brain varies. Studies have found that the astrocyte proportion varies by region ...

                                               

Autonomic dysreflexia

AD usually happens in people with spinal cord injuries that have caused damage above the sixth thoracic vertebra T6, which is about at the same level of the armpits. However, AD sometimes happens in people with spinal damage as low as their tenth ...

                                               

Axillary nerve

The axillary nerve is a nerve in the armpit. It comes from the brachial plexus. It has nerve fibers from the C5 and C6 nerve roots. The axillary nerve goes through the quadrangular space. It is sometimes called the circumflex nerve.

                                               

Peripheral nervous system

The peripheral nervous system, or PNS, is part of the nervous system. It consists of the nerves and ganglia which are outside the central nervous system. The main function of the PNS is to connect the central nervous system to the limbs and organ ...

                                               

Baculum

The baculum, is a bone found in the penis of many male mammals. It is absent in the human penis, but present in the penises of our close relatives the apes, such as the gorilla and chimpanzee. The bone is located along the top of the penis and it ...

                                               

Castration

Castration is any action, surgical, chemical, or otherwise, by which a male loses the functions of the testes or a female loses the functions of the ovaries. It is also a type of anaphrodisiac.

                                               

Cystocele

A cystocele, is also known as a prolapsed bladder or anterior vaginal wall prolapse. This is a medical condition when a womans bladder bulges into her vagina. Sometimes it can bulge out through her vagina Some women can have a cystocele but may h ...

                                               

Fertility

Fertility is the natural capability to give life. In humans and animals, fertility means that the parent can produce babies. More precisely, fertility is the capacity of an individual or population to produce viable offspring. By viable is meant ...

                                               

Gamete

A gamete is a specialized sex cell that fuses with another gamete during fertilization in organisms that reproduce sexually. Gametes are produced by germ cells. In species which produce two morphologically distinct types of gametes, and in which ...

                                               

Human chorionic gonadotropin

Human chorionic gonadotropin is a hormone produced during pregnancy. Some tumors might produce this hormone. From December 6, 2011, the made illegal selling hCG diet products in pharmacies. Controversy about injected hCG for weight loss started m ...

                                               

Sex organ

The sex organs, which scientists call the genitalia or genitals, are the parts of the body that allow sexual reproduction to take place. They are also for urination, to remove waste products from the body. While all animals have sex organs, this ...

                                               

Sexual arousal

Sexual arousal is the feeling humans and animals get when they are ready to have sexual intercourse. Someone who can only get sexually aroused after forming an emotional bond with someone is called a demisexual.

                                               

Respiratory system

For the biochemical process, see respiration The respiratory system, also called the gas exchange system, is the body getting rid of carbon dioxide and taking in oxygen. Carbon dioxide, a waste product, goes out of the body. Oxygen, which the bod ...

                                               

Breath sounds

Breath sounds are the sounds made by air as it moves through the respiratory system. Breath sounds are also called lung sounds or respiratory sounds. Sometimes they can be heard by anyone; other times they can be heard only by listening to the lu ...

                                               

Bronchoscopy

Bronchoscopy is a medical procedure which is used to look at the inside of a persons airways. It can be used to see the inside of the trachea, and the bronchi and bronchioles within the lungs. There are three types of bronchoscopy: rigid, flexibl ...

                                               

Carriers constraint

Carriers constraint is an observation about air-breathing vertebrates which flex their bodies sideways when moving. They find it very difficult to move and breathe at the same time. The sideways flexing expands one lung and compresses the other, ...

                                               

Cystic fibrosis

Cystic fibrosis, also known as mucoviscidosis, CF, and 65 roses, is a condition a person may get from their parents. It makes the body make thick, sticky mucus, which builds up in the lungs, the digestive system, and other parts of the body. If b ...

                                               

Pneumothorax

Pneumothorax is a health problem where air or gas is in the pleural space. The pleura is a slim membrane that covers the lungs. The two parts of the pleura usually touch. A hole might grow in the surface of the lung. Air then enters between the p ...

                                               

Pulmonary contusion

A pulmonary contusion is a contusion of the lung, caused by chest trauma. The bruise harms the capillaries, and then blood and other liquids collect in the lungs. These extra liquids prevent with gas exchange. Without gas exchange, oxygen levels ...

                                               

Tension pneumothorax

A tension pneumothorax is when air builds up inside the chest. So much air builds up that one or both lungs may collapse. This causes serious breathing problems. Also, the air in the chest pushes on the heart and other important parts of the body ...

                                               

Sensory system

The sensory system is the way animals find out about their nearby environment and their bodies. To do this they have special devices for collecting data called sense organs. The sense organs act as transducers: they turn energy from the outside o ...

                                               

ASMR

Autonomous sensory meridian response is a tingling sensation. It often starts on the scalp, and moves down the back of the neck and upper spine. It is an unusual feeling which has no obvious physical cause. It has been compared with auditory-tact ...

                                               

Lateral line

The lateral line is a system of sense organs found in fish, and not in land vertebrates. It detects movement and vibration in the surrounding water. Modified epithelial cells, known as hair cells, respond to changes around the fish. These turn th ...

                                               

McGurk effect

The McGurk effect shows how hearing and vision are used for speech perception. Named after the man who found it, Harry McGurk, it says that people hear speech with their ears, and use other senses to help interpret what they hear. The McGurk effe ...

                                               

Olfaction

Olfaction is the sense of smell. The sense of smell is how a human or animal notices a smell by using the nose. Many animals have better noses than people. Some animals can detect small particles in the air or sometimes water that people cannot. ...

                                               

Olfactory bulb

The olfactory bulb is a part of the vertebrate forebrain. It works in olfaction, or the sense of smell. The olfactory bulb has one source of sensory input axons from olfactory receptor neurons, and one output mitral cell axons. It is thought that ...

                                               

Olfactory system

The olfactory system is the sensory system used for olfaction or the sense of smell. Most mammals and reptiles have two parts to their olfactory system. There is a main olfactory system, which detects volatile, airborne substances. There is secon ...

                                               

Synesthesia

Synesthesia, or synaesthesia, is a condition where the brain mixes up the senses. People who have synesthesia are called synesthetes. Synesthesia is usually inherited called congenital synesthesia, but exactly how people inherit it is unknown. Sy ...

                                               

Taste

Taste is one of the senses experienced by humans and other animals. It is felt by the tongue while eating, and is used to sense the flavor of food that is in the mouth. Humans can sense five tastes: sweet, sour, bitter, salty, and umami. Humans h ...

                                               

Texture

The word texture means: what things are made of and how they feel. Textures can be described as" rough”," smooth”," hard”," soft”," liquid”," solid”," lumpy”," gritty” etc. The word" texture” is used for many different things. It can even be used ...

                                               

Touch

This article is about one of the five main senses. For other uses, see Touch disambiguation Touch is one of the five main senses that animals have. It can be called the sense of body or the sense of touch. The system also has internal sensory rec ...

                                               

Urinary system

The urinary system is a system of organs that makes urine/pee and takes it out of the body. Urine is watery waste of the body. Our body needs to collect this waste and get rid of it. Our body makes urine in two organs - the kidneys. To make urine ...

                                               

Urethral sponge

The urethral sponge is a spongy cushion of tissue, found in the lower genital area of females, that sits against both the pubic bone and the vaginal wall, and is around the urethra.

                                               

Urinary tract infection

A urinary tract infection is an infection caused by bacteria in part of the urinary tract. In the lower urinary tract, it is simple cystitis. In the upper urinary tract, it is a kidney infection. Symptoms from a lower urinary tract infection incl ...

                                               

Urine

Urine is a liquid created by the body in the kidneys. It is stored in the bladder and comes out of the human body through the urethra, a tube which leads from the bladder to the urethral meatus, at the tip of the penis or the vulva. Urinating is ...

                                               

American Red Cross

The American Red Cross, also known as The American National Red Cross, is a humanitarian group that gives emergency assistance, disaster relief, and teaches people how to prepare for disasters in the United States. It is the official US group rel ...

                                               

Amnesty International

Amnesty International is an international organization founded in London in 1961. They promote human rights in accordance with Universal Declaration of Human Rights and international human rights law. This organization was the recipient of the No ...

                                               

Azerbaijan Red Crescent Society

Azerbaijan Red Crescent Society is a charitable organization in Azerbaijan. It is a member of the International Red Cross and Red Crescent Movement. It was established on March 10, 1920. Its headquarters are in Baku. Their mission is "to serve vu ...

                                               

Battersea Dogs & Cats Home

Battersea Dogs & Cats Home is the United Kingdoms oldest and most famous home for dogs and cats. It is in the Battersea area of London, England. The home gets its money from donations.

                                               

British Red Cross

The British Red Cross is the United Kingdom body of the neutral humanitarian network the Red Cross. The society was formed in 1870 and is a registered charity with over 32.500 volunteers and 3500 staff. The charity helps people both in the UK and ...