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The human body produces and destroys 15 million blood cells every second.
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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
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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.
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Medication errors are three times higher among children and infants than with adults.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.