Medical Science

Neurotransmitters are chemical substances which function as signal transmitters from a nerve ending to another cell or to a gland. They can belong to several different categories of neuro-chemicals including amino acids, monoamines and peptides. Within these categories, some of…
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The human body is a miraculous machine. With around 206 bones and 650 muscles, and a heart which is around the size of a grapefruit, the body keeps people moving, breathing and functioning with little or no outside help. That in…
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Three types of hair Hair is a keratinized filament produced from hair follicles in the skin. Three different types of hair can be found in humans: lanugo hair, vellus hair and terminal hair. Lanugo hair Lanugo hair is fine, long…
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The Human Thalamus: A Data-Gatherer and Information Relay Station Second to None The term relay; it can refer to a baton-transferring race, or a transmitting beacon. It can also refer to any one of a number of ways in which…
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For the proper growth and development of the human body, for the regulation of energy levels and other vital body functions, and for the ability to produce offspring in male and female, as well as for the maintenance of various…
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Platelets are the smallest of three major blood cell type, which also includes red and white blood cells. Produced in the bone marrow, tiny, irregularly-shaped platelets circulate in the bloodstream and help blood clot when wounded and prevent excessive bleeding….
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Hormones in the body are chemical messengers that relate signals or information from one set of cells to another. Specific hormones are secreted by a collection of glands which form the Endocrine System. Together, over 50 hormones serve to regulate…
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The Difference Between Breathing and Respiration Humans, as well as all multi-cellular organisms on Earth, depend upon oxygen to produce the large quantities of energy necessary for life and intelligence. This oxygen must be transported from the atmosphere outside out…
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The human spine provides protection, support and shape. It provides protection for the spinal cord. It is a site of muscle and bone attachment. It also is part of the bone structure that gives humans the biped form. It is…
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Definition: An injury where the skin has become discoloured, caused by a blow or impact. It ruptures capillaries and this is what causes the bruise to appear. There are three different types of bruises; Subcutaneous, Intramuscular and Periosteal (where they…
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