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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.
Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.
The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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