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The familiar sounds of your heart are made by the heart's valves as they open and close.
Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).
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.
There are 20 feet of blood vessels in each square inch of human skin.
The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.