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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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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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The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.
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Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.
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Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.