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Did you know?

The Centers for Disease Control and Prevention (CDC) was originally known as the Communicable Disease Center, which was formed to fight malaria. It was originally headquartered in Atlanta, Georgia, since the Southern states faced the worst threat from malaria.

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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.

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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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Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.

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About 60% of newborn infants in the United States are jaundiced; that is, they look yellow. Kernicterus is a form of brain damage caused by excessive jaundice. When babies begin to be affected by excessive jaundice and begin to have brain damage, they become excessively lethargic.

Glioma. (a) Illustration of a large glioma (colored area) within the left cerebral hemisphere in a s Glioma. (a) Illustration of a large glioma (colored area) within the left cerebral hemisphere in a s
Cholelithiasis. Common sites of gallstones in the generalized condition. (a) Stones in the hepatic d Cholelithiasis. Common sites of gallstones in the generalized condition. (a) Stones in the hepatic d
Major Findings of the High Scope Preschool Study High Scope participants showed better academic per Major Findings of the High Scope Preschool Study High Scope participants showed better academic per
Beware of “Common Sense” Explanations Beware of “Common Sense” Explanations
Stethoscope with both a bell and flat disc amplifier. Stethoscope with both a bell and flat disc amplifier.
Stethoscope with both a bell-shaped and flat-disc amplifier Stethoscope with both a bell-shaped and flat-disc amplifier
Video: Electrical changes in the heart

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