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Blood platelets

Blood platelets

P256/0045

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49.6 MB (4.6 MB compressed)

4134 x 4193 pixels

35.1 x 35.6 cm ⏐ 13.8 x 14.0 in (300dpi)

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Credit

NIBSC / SCIENCE PHOTO LIBRARY NIBSC / SCIENCE PHOTO LIBRARY

Caption

Blood platelets. Coloured scanning electron micro- graph (SEM) of activated blood platelets. Platelet cells (thrombocytes) are formed in the bone marrow, and circulate in the bloodstream in large numbers. When unactivated they are round/oval, whereas activated platelets develop pseudopodia or extensions from the cell wall as seen here. Platelets function in two ways: they plug defects in the walls of damaged blood vessels, and they are involved in the clotting of blood. They also release serotonin which constricts blood vessels. Magnification: x3,300 at 6x6cm size.

Release details

Model release not required. Property release not required.

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