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Did you know?

Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.

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The average adult has about 21 square feet of skin.

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The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.

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Allergies play a major part in the health of children. The most prevalent childhood allergies are milk, egg, soy, wheat, peanuts, tree nuts, and seafood.

Did you know?

In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).

A freshly applied autograft. Note that the donor skin has been perforated so that it can be stretche A freshly applied autograft. Note that the donor skin has been perforated so that it can be stretche
Lung cancer. Photograph of part of a lung removed after death. The yellow area is a large tumor and Lung cancer. Photograph of part of a lung removed after death. The yellow area is a large tumor and
Current FDA Pregnancy Category Ratings with Examples Current FDA Pregnancy Category Ratings with Examples
Four areas of secondary motor cortex—the supplementary motor area, the premotor cortex, and two ... Four areas of secondary motor cortex—the supplementary motor area, the premotor cortex, and two ...
Give the world a reason to remember your name Give the world a reason to remember your name
Categories and Examples of Hormones Categories and Examples of Hormones
Video: Biological organic compounds

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