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Author Question: The average adult's lungs contain about ________ million alveoli (spongy, air-filled sacs) that are ... (Read 57 times) |
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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The horizontal fraction bar was introduced by the Arabs.
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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.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.