ALFRED PASIEKA / SCIENCE PHOTO LIBRARY ALFRED PASIEKA / SCIENCE PHOTO LIBRARY
Heparin-filled syringe. Heparin is an anticoagulant found naturally in the human body. It occurs mainly in tissues surrounding the capillaries of the liver and lungs, where it inhibits the formation of blood clots. Heparin is made synthetically as a drug, known as low molecular weight heparin (LMWH), which is used to prevent thrombosis and embolism in patients with vascular diseases. It is also used to prevent clotting during open heart surgery, heart bypass surgery and kidney dialysis, to prevent clotting.
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