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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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Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Essential fatty acids have been shown to be effective against ulcers, asthma, dental cavities, and skin disorders such as acne.
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People about to have surgery must tell their health care providers about all supplements they take.