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