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Thrombocytes
68K 12-01 Hemo 101 Unit 2
6
Other
Undergraduate 2
01/12/2012

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Term
Thromocyte production/lifespan
Definition
platelyts are portions of cytoplasm sloughed off by the megakaryocyte. live for around 9-12 days, 2/3 in peripheral blood, the other third are stored in spleen and are interchangeable with those in the blood.
Term
Platlet Function
Definition
Essential to coagulation or blood clotting, acts as plugs around wound sites, release factors that are essential to blood clotting formation.
Term
Megakaryoblast
Definition
14-18 microns N/C ratio 4:1, small to moderate amount of cytoplasm, varying shades of blue, small, blunt pseudopods, Nucleus comprises most of the cell, round oval or kidney shaped, fine chromatin pattern, multiple nucleoli.
Term
Promegakaryocyte
Definition
20-60 microns 4:1 or 1:1, More abundant cytoplasm, less basophilic, granules begin to form, coarse chromatin, multiple irregularly shaped nucleoli, irregular nucleus.
Term
Megakaryocyte
Definition
30-160 microns 1:1 - 1:12 N/C consists of cloarse clumped granules which break off to become platelets, No nucleoli, multiple nuclei.
Term
Platelet
Definition
2-4 microns, Light blue to purple, very granular, no nucleus, not a true cell.
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