SECCHI-LECAQUE / ROUSSEL-UCLAF / COL. V. GREMET / CNRISCIENCE PHOTO LIBRARY SECCHI-LECAQUE / ROUSSEL-UCLAF / COL. V. GREMET / CNRISCIENCE PHOTO LIBRARY
Blood clot, coloured scanning electron micrograph (SEM). Red blood cells (erythrocytes, violet) are trapped within a fibrin protein mesh (cream). The fibrin mesh is formed in response to chemicals secreted by platelets (light purple), fragments of white blood cells. Clots are formed in response to cardiovascular disease or injuries to blood vessels. A white blood cell (dark purple) is also seen.
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