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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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Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.

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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.

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The longest a person has survived after a heart transplant is 24 years.

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Human kidneys will clean about 1 million gallons of blood in an average lifetime.

The control of breathing via respiratory centres in the mammalian brain. The control of breathing via respiratory centres in the mammalian brain.
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