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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Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.
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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
Antineoplastic agents and the cell cycle
Major parts of the cell and the structures located inside the cell.