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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.
Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.
When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.