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Did you know?

There are 20 feet of blood vessels in each square inch of human skin.

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 office desk has 400 times more bacteria on it than a toilet.

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Vaccines prevent between 2.5 and 4 million deaths every year.

Did you know?

Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

One DNA double helix becomes two One DNA double helix becomes two
If you want to show differences between items at the same time, a bar graph is more effective than a If you want to show differences between items at the same time, a bar graph is more effective than a
Drug development time line. Drug development time line.
Some Ford metal line connections use springlocks and O-rings. Some Ford metal line connections use springlocks and O-rings.
The NIOSH Pocket Guide entry for gasoline. Useful information includes health effects and chemical ... The NIOSH Pocket Guide entry for gasoline. Useful information includes health effects and chemical ...
DNA double helix model DNA double helix model
Video: How a Urinalysis is Performed

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