M. WOLFELSPERGER - CNRI / SCIENCE PHOTO LIBRARY M. WOLFELSPERGER - CNRI / SCIENCE PHOTO LIBRARY
Blood clot. Interference contrast light micrograph of red blood cells (round) and a mesh of fibrin protein fibres (strands). The fibrin mesh is formed in response to chemicals secreted by platelets (not shown), fragments of white blood cells. Clots are formed in response to cardiovascular disease or injuries to blood vessels.
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