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Red blood cells, monocyte, neutrophil, T lymphocyte and platelets
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20315B

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Image #   20315B
Name:   Activated and nonactivated platelets
Copyright:   Copyright 2000 Dennis Kunkel Microscopy, Inc.
Description:   Caption: Activated and nonactivated platelets with channels of the open canalicular system (OCS). Platelets are cell fragments in the blood that play an essential role in blood clotting and wound repair. Platelets can also activate certain immune responses. Platelets are formed in the red bone marrow, lungs, and spleen by fragmentation of very large cells known as megakaryocytes. Platelets in the blood are small oval disks and are termed nonactivated platelets or thrombocytes. Platelets serve as the body's first line of defense to prevent excessive blood loss. When an injury such as a cut is sustained, platelets (now known as activated platelets) change their shape, become sticky and build up on a vessel wall to form a plug. They are also involved in the secretion of a chemical platelet factor which helps produce threads of fibrin. Bloods cells collect in the entangled fibrin and platelet mass forming a blood clot at the site.
Magnification*: x4,000
Type: SEM
    *(Magnifications are based on a 35mm slide image of 24mm in the narrow dimension.)
Keywords:   20315B human body blood human platelet nonactivated platelet open canalicular system OCS thrombocyte activated clot medical thrombocyte thrombocytes SEM

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