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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.
Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).
The FDA recognizes 118 routes of administration.
Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.