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Did you know?
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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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.
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Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.