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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%

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Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.

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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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Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.

The complexity of a tropical forest may have favored the evolution of primate intelligence. The complexity of a tropical forest may have favored the evolution of primate intelligence.
The Procedure Used to Produce Conditioned Emotional Responses The Procedure Used to Produce Conditioned Emotional Responses
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Video: Neural regulation of blood pressure - baroreceptor and chemoreceptor reflexes

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