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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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Your heart beats over 36 million times a year.
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The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.
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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.
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The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.