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Platelets


Platelets are cell fragments produced from megakaryocytes.
Blood normally contains 150,000 to 350,000 per microliter (µl). If this value should drop much below 50,000/µl, there is a danger of uncontrolled bleeding.
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Platelets
Platelet numbers are given, as well as information about their size and the range of sizes in the blood.
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platelets: small disk-shaped blood fragments produced in the bone marrow that serve as the starting material for blood clotting.
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Platelets result from cell fragmentation and are involved with clotting. Platelets are cell fragments that bud off megakaryocytes in bone marrow. They carry chemicals essential to blood clotting.
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yolk platelets - membrane-bound discs containing high concentrations of yolk found in eggs.
yolk plug - a patch of vegetal cells (endoderm) that remains exposed in the blastopore after the formation of the ventral lip during gastrulation.
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thrombocytes platelets. thromboxanes A class of molecules derived from arachidonate and involved in platelet aggregation during blood clotting. Thromboxanes have a common feature of a 6-membered, ether-containing ring.
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Recent research has capitalized on the cloning of an important signalling receptor for collagen, glycoprotein VI, which is expressed only on platelets, ...
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Every human cell (except for red blood cells and the platelets that are critical to normal blood clotting and wound healing) contains a discrete nucleus that has within the roughly 6 feet of a special chemical called deoxyribonucleic acid, or DNA.
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thrombocytopaenia (<100 platelets per mm3 or estimated as less than 3 platelets per high power field) ...
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serotonin - increase vascular permeability and smooth muscle contraction. Originates from platelets ...
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An example of a multipotent stem cell would be the hematopoietic stem cell, which can give rise to all the blood lineages, including white blood cells, leukocytes, lymphocytes, the platelets, the red blood cells, and macrophages.
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