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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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Everyone has one nostril that is larger than the other.
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There are more sensory neurons in the tongue than in any other part of the body.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.