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Did you know?
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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Asthma cases in Americans are about 75% higher today than they were in 1980.
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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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Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.
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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.