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see blood clottingblood clotting,
process by which the blood coagulates to form solid masses, or clots. In minor injuries, small oval bodies called platelets, or thrombocytes, tend to collect and form plugs in blood vessel openings.
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(also thrombocyte), a formed element found in the blood of vertebrate animals and man that plays an important role in blood coagulation. The platelets of vertebrate animals (except mammals) are small ovoid cells with a solid nucleus and weakly basophilic cytoplasm. In mammals, including man, platelets are anuclear bodies 2–5 µ in diameter. The platelets normally number about 250,000–350,000 per cubic mm of blood. They have granules containing serotonin and substances involved in blood coagulation, as well as mitochondria, microtubules, glycogen granules, and sometimes ribosomes. In mammals, platelets originate in the blood-forming organs when fragments of the cytoplasm of megakaryocytes separate from the megakaryocytes. The life-span of the platelets of mammals, including man, is about five to nine days.


Markosian, A. A. Fiziologiia trombotsitov. Leningrad, 1970.


A small ice crystal which, when united with other such crystals, forms a layer of floating ice, especially sea ice, and serves as seed crystals for further thickening of the ice cover.


a minute cell occurring in the blood of vertebrates and involved in clotting of the blood
References in periodicals archive ?
Another set of experiments focused on the determination of TBARS levels as a measure of nonenzymatic lipid peroxidation in resting blood platelets and enzymatical peroxidation of arachidonic acid in blood platelets stimulated by thrombin.
Dr Shahinaz also said that blood platelet donation is a secure operation.
Importantly, we demonstrated the platelets incorporated into thrombi (blood clots) in living mice in a manner similar to that observed for normal blood platelets.
Biotechnology company Rigel Pharmaceuticals (NasdaqGS:RIGL) reported on Friday that it has completed patient enrollment for both studies under the FIT Phase 3 clinical programme of fostamatinib in immune thromboycytopenic purpura (ITP), when the immune system attacks and destroys the body's own blood platelets.
Washington, Dec 11 (ANI): Researchers from the Swedish medical university Karolinska Institutet have shown that polyphosphate from blood platelets have a major role to play in inflammation and the formation of blood clots.
At 12 and 13, these kids are too young to donate blood platelets to help her and other cancer victims, but their voices are plenty old enough to be heard.
Antiplatelets are agents that prevent blood platelets from aggregating;
At the AAAS meeting, he unveiled data from new studies indicating that flavonoid-rich foods may benefit the heart yet another way, by damping the reactivity of blood platelets.
OTCBB:PKTX) announces the results of extensive testing of the storage of blood platelets done by the Etablissement Francais du Sang-Alsace (EFS).
executive spends 90 minutes donating blood platelets for cancer patients undergoing chemotherapy and radiation.
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SAN DIEGO -- Ligand Pharmaceuticals Incorporated (NASDAQ:LGND) (the "Company" or "Ligand") announced today that the Company is initiating Phase I clinical trials of LGD 4665, an oral, small molecule drug that mimics the activity of thrombopoietin (TPO), a growth factor that promotes growth and production of blood platelets.