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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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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
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There are 60,000 miles of blood vessels in every adult human.
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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.