Activated platelet. Coloured scanning electron micrograph (SEM) of an activated blood platelet. Platelet cells (thrombocytes) are formed in the bone m

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Activated platelet. Coloured scanning electron micrograph (SEM) of an activated blood platelet. Platelet cells (thrombocytes) are formed in the bone marrow and circulate in the blood in large numbers. In an unactivated state they are round/oval, whereas this activated platelet has developed extensions from the cell wall known as pseudopodia. Platelets plug defects in the walls of blood vessels and are involved in clotting. They also release serotonin which constricts blood vessels. Magnification: x12,200 at 6x7 cm size. Magnification: x40,000 at size.

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Size: 3542px × 2835px
Photo credit: © STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: activated, anatomy, blood, body, human, platelet, platelets, releaser, serotonin, thrombocyte