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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 horizontal fraction bar was introduced by the Arabs.
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Your chance of developing a kidney stone is 1 in 10. In recent years, approximately 3.7 million people in the United States were diagnosed with a kidney disease.
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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.