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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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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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Limit intake of red meat and dairy products made with whole milk. Choose skim milk, low-fat or fat-free dairy products. Limit fried food. Use healthy oils when cooking.
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In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.