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Did you know?
The horizontal fraction bar was introduced by the Arabs.
Did you know?
There are 60,000 miles of blood vessels in every adult human.
Did you know?
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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.
Did you know?
Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.