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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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The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.
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Your heart beats over 36 million times a year.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.