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Did you know?

The average human gut is home to perhaps 500 to 1,000 different species of bacteria.

Did you know?

According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.

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

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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.

Common skin signs. Each of the illustrations depicts a section through skin Common skin signs. Each of the illustrations depicts a section through skin
The explosion of the Maine in Havana harbor, killing 260 men, caused much speculation in the newspap The explosion of the Maine in Havana harbor, killing 260 men, caused much speculation in the newspap
Time course of HIV infection. Time course of HIV infection.
Skin layer diagram Skin layer diagram
Opener Pigment mutations within an ear of corn, caused by transposition of the Ds element Opener Pigment mutations within an ear of corn, caused by transposition of the Ds element
One surface barrier to infection One surface barrier to infection
Video: Magnetic resonance imaging (MRI)

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