Blood clot, SEM

Blood clot, SEM

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Credit: STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY

Caption: Blood clot. Coloured scanning electron micrograph (SEM) of fibrin strands immobilising and, in the process, distorting red blood cells (RBCs). RBCs, or erythrocytes, make up 99% of the cells in blood. They carry oxygen around the body and their unique surface shape (biconcave) maximises the amount carried. If damage occurs to a blood vessel, a protein found in blood called fibrinogen will be converted to fibrin, an insoluble protein. Fibrin molecules make a tangled net of fibres which immobilises the fluid portion of blood and also traps the RBCs. Along with the action of platelets, this is sufficient to prevent a dangerous loss of blood. Magnification not known.

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Keywords: anatomy, biological, biology, caught, cells, circulation, circulatory, clot, clotting, coloured, distorted, distortion, erythrocyte, erythrocytes, fibers, fibres, fibrin, haematology, hematology, human body, immobilise, immobilised, mesh, oxygen transport, rbc, rbcs, red blood cell, scanning electron micrograph, sem, snared, trapped

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