Coloured SEM of an early blood clot forming

Coloured SEM of an early blood clot forming

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Credit: POWER AND SYRED/SCIENCE PHOTO LIBRARY

Caption: Blood clot. Coloured Scanning Electron Micrograph of an early blood clot. The red blood cells are forming 'rouleaux' (rolls) as they become enmeshed in a tangle of fibrin fibres (yellow). Blood clots form when blood cells called platelets are activated by contact with damaged blood vessels. The platelets clump together and release chemical factors into the blood. These factors start a cascade of chemical reactions that turns the soluble protein fibrinogen into insoluble protein fibres called fibrin. The fibrin forms a dense network that enmeshes blood cells and eventually tightens into a solid clot. Magnification: x3,150 at 5x7cm size. x10,500 at 10x8"

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Keywords: anatomy, blood, blood clot, clot, coagulation, fibrin, human body, in blood clot, process, red blood cells, rouleau, sem, thrombus

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