Blood clot. Coloured Scanning Electron Micrograph (SEM) of a blood clot. Spiky blood cells called platelets have become enmeshed in a network of fi- brin fibres (red). Blood clots form when platelets are activated by contact with damaged blood vess- els. The activated cells turn into spiky spheres that clump together and release chemical factors into the blood. These factors activate more plate- lets as well as starting a cascade of chemical reactions that turns the soluble protein fibrino- gen into insoluble protein fibres called fibrin. The fibrin fibres form a dense network that enmeshes blood cells and eventually tightens into a solid clot. Magnification unknown | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Phillips, D. |
Bildgröße: | 5401 px × 3593 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
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