Platelet count

Platelet (thrombocyte) count. Platelets (thrombocytes) are the smallest type of blood cell. They play a major role in blood clotting. When bleeding occurs, the platelets swell, clump together, and form a sticky plug that helps stop the bleeding. If there are too few platelets, uncontrolled bleeding may be a problem. If there are too many platelets, there is a risk of a blood clot forming in a blood vessel. Also, platelets may be involved in hardening of the arteries, or atherosclerosis.
This is part of the CBC – Complete Blood Count Test.
More definitions of Platelet on the web found here.

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