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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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Your heart beats over 36 million times a year.
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The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.
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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
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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.