Did you know?
About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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The top 10 most important tips that will help you grow old gracefully include (1) quit smoking, (2) keep your weight down, (3) take supplements, (4) skip a meal each day or fast 1 day per week, (5) get a pet, (6) get medical help for chronic pain, (7) walk regularly, (8) reduce arguments, (9) put live plants in your living space, and (10) do some weight training.
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The average adult has about 21 square feet of skin.
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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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The tallest man ever known was Robert Wadlow, an American, who reached the height of 8 feet 11 inches. He died at age 26 years from an infection caused by the immense weight of his body (491 pounds) and the stress on his leg bones and muscles.
Elephantiasis in a human leg.
The human oxygen-hemoglobin dissociation curve.
Cross-section view of the human eye.
Psychoactive substances: (left) Psilocybin is obtained from a species of mushroom; (right) LSD is ...
The human hypothalamus (in color) in relation to the optic chiasm and the pituitary gland.
A wide variety of pathogens may live on or in the human body