The familiar sounds of your heart are made by the heart's valves as they open and close.
Did you know?
Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
Did you know?
Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.
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Cyanide works by making the human body unable to use oxygen.
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A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.
Lab values
Anterior pituitary and its target organs.
How to create a table of values from an equation and graph