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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 ?
He said the medial report mentioned that the patient had been given enough blood platelets on time as found by the committee from the the blood cell and tissue tests reports attached with the victim's medical file.
Dr Shahinaz clarified that blood platelet donation is similar to blood donation but it takes longer time.
Clearance of the Company's supplemental NDA provides for even broader use of Agrylin as the only drug indicated for treating thrombocythemia (elevated blood platelet count) in ET, PV, CML, and other myeloproliferative disorders.
Human BioSystems (OTCBB:HBSC), developer of preservation platforms for organs and other biomaterials, announces today that it plans to commence blood platelet testing at a second independent laboratory under a research agreement signed in June, 2005.
A genetically engineered molecule developed by Ares-Serono, IL-6 is showing promise in the treatment of blood platelet deficiency (thrombocytopenia), a condition frequently resulting from chemotherapy and radiotherapy in cancer treatment.
Some point to increases in blood pressure or heart rate, while other studies hint that an increased tendency of blood platelets to clump or stick together when a person gets up in the morning may reduce blood flow in arteries already narrowed by atherosclerotic plaque (SN: 6/27/87, p.
It interacts with blood platelets and fibrin to form a hemostatic matrix -- a gelatinous clear shield that seals the wound and stops bleeding quickly and safely.
Currently housed in the pediatrics intensive care unit at Kaiser Permanente Hospital in Los Angeles, Kristen is in critical but stable condition, under constant supervision and is in great need of blood and blood platelets.
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SAN DIEGO -- Ligand Pharmaceuticals Incorporated (Nasdaq:LGNDE) announced today that the company has earned a $2 million milestone payment from GlaxoSmithKline (NYSE:GSK) with that company's filing of an IND for SB-559448, a small-molecule drug that mimics the activity of thrombopoietin (TPO), a protein factor that promotes growth and production of blood platelets.
There, the cause of her bleeding was found to be a low count of blood platelets, said her Kaiser doctor, Leora Britvan.