Blood clot, SEM

Blood clot, SEM

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Caption: Blood clot. Coloured scanning electron micrograph (SEM) of a blood clot. Red blood cells (erythrocytes, red) are seen trapped in filaments of fibrin protein (brown). Blood clotting is the solidification of blood that occurs when blood vessels are damaged, thereby limiting blood loss. Blood vessel damage activates blood cells called platelets, which in turn help to stimulate the formation of fibrin filaments at the site of injury. These filaments enmesh platelets and red blood cells, contracting around them to form a solid clot. Inappropriate clotting is a major cause of strokes and heart attacks. Magnification: x3800 when printed at 10 centimetres wide.

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Keywords: anatomy, blood, cell, cells, circulation, circulatory, clot, clotting, coagulated, coagulating process, coagulation, coloured, erythrocyte, erythrocytes, fibre, fibres, fibrin, filament, filaments, human body, images, magnified image, many, microscopic photos, multiple, physiological, physiology, red, scanning electron micrograph, sem, strand, strands, subjects, vascular

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