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Stock Photo: RED BLOOD CORPUSCLE. RED BLOOD CORPUSCLE Red blood cells, or corpuscles, play a crucial role in the transportation of hemoglobin, bringing oxygen to tissues. These round cells measure 7 micrometers in diameter, are shaped like biconcave disks and exhibit an elasticity and deformability allowing them to move through the smallest capillaries. Red blood cells are produced by erythroblasts and live in the blood stream for about 120 days. At the end of their life, they are destroyed by macrophage