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Did you know?

More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

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There are approximately 3 million unintended pregnancies in the United States each year.

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It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.

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Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.

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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

Comparison of the radius of fruits produced by native and introduced species of Sapindaceae Comparison of the radius of fruits produced by native and introduced species of Sapindaceae
Example of a Regulatory System Example of a Regulatory System
Additional Disorders of the Skeletal System Additional Disorders of the Skeletal System
The mesotelencephalic dopamine system in the human brain, consisting of the nigrostriatal pathway ... The mesotelencephalic dopamine system in the human brain, consisting of the nigrostriatal pathway ...
Fatty acid desaturation system Fatty acid desaturation system
In another solar system, a planet has an airless moon Zygo that is 4.0 × 105 m in diameter. ... In another solar system, a planet has an airless moon Zygo that is 4.0 × 105 m in diameter. ...
Video: Male Reproductive System - Testosterone

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