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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.

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The familiar sounds of your heart are made by the heart's valves as they open and close.

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Illness; diuretics; laxative abuse; hot weather; exercise; sweating; caffeine; alcoholic beverages; starvation diets; inadequate carbohydrate consumption; and diets high in protein, salt, or fiber can cause people to become dehydrated.

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There are 60,000 miles of blood vessels in every adult human.

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Never take aspirin without food because it is likely to irritate your stomach. Never give aspirin to children under age 12. Overdoses of aspirin have the potential to cause deafness.

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