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Did you know?
After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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The term pharmacology is derived from the Greek words pharmakon("claim, medicine, poison, or remedy") and logos ("study").
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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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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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Blood is approximately twice as thick as water because of the cells and other components found in it.