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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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On average, the stomach produces 2 L of hydrochloric acid per day.
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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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More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.
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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.