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IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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There are 20 feet of blood vessels in each square inch of human skin.
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The average office desk has 400 times more bacteria on it than a toilet.
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Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.