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Did you know?
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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There are more nerve cells in one human brain than there are stars in the Milky Way.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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People about to have surgery must tell their health care providers about all supplements they take.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.