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Did you know?

Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.

Did you know?

Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.

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Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).

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More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.

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You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.

This image shows an artists depiction of a 10-kilometer (six-mile) diameter astero This image shows an artists depiction of a 10-kilometer (six-mile) diameter astero
Features found in a long bone. Features found in a long bone.
True-color image of layers of haze in Titan's atmosphere. True-color image of layers of haze in Titan's atmosphere.
long bone long bone
Bone Surface Markings: Head Bone Surface Markings: Head
Superior view of sphenoid bone in floor of cranium Superior view of sphenoid bone in floor of cranium
Video: Rods and Cones Animation

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