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platelet |
Also found in: Medical, Encyclopedia, Wikipedia | 0.07 sec. |
plateletTiny disc-shaped structure found in the blood, which helps it to clot. Platelets are not true cells, but membrane-bound cell fragments without nuclei that bud off from large cells in the bone marrow. They play a vital role in blood clotting as they release blood clotting factors at the site of a cut. Over twelve clotting factors have been discovered and they produce a complex series of reactions which ultimately leads to fibrinogen, the inactive blood sealant always found in the plasma, being converted into fibrin. Fibrin aggregates into threads which form the fabric of a blood clot. |
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| The coagulation of the blood is also initiated by the blood platelets. Four patients undergoing emergency surgeries at Sacred Heart Medical Center desperately needed transfusions of blood platelets. The bitter irony to Red Cross officials is that nowhere in the country are blood platelets needed more, but in such shortage right now, than here in Los Angeles. |
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Blood platelets
