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Did you know?

Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.

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The horizontal fraction bar was introduced by the Arabs.

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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.

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A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.

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Medication errors are more common among seriously ill patients than with those with minor conditions.

Meningocele. (a) A meningocele is a herniation of the meninges, usually associated with the spinal c Meningocele. (a) A meningocele is a herniation of the meninges, usually associated with the spinal c
This bike actually flies—thanks to six horizontal propellers and a battery-powered motor. Changing ... This bike actually flies—thanks to six horizontal propellers and a battery-powered motor. Changing ...
The movement of a bolus of food from the mouth to the stomach via the esophagus. The movement of a bolus of food from the mouth to the stomach via the esophagus.
Rapid Eye Movement Rapid Eye Movement
Trapezius muscle movement Trapezius muscle movement
Genetic Drift in Large and Small Populations Genetic Drift in Large and Small Populations
Video: The Hypothalamus: The Body's Thermostat (Human Thermostat)

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