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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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Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.
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There are 60,000 miles of blood vessels in every adult human.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").