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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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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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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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The oldest recorded age was 122. Madame Jeanne Calment was born in France in 1875 and died in 1997. She was a vegetarian and loved olive oil, port wine, and chocolate.

