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Bone marrow stem cell on colagen fibrils. Coloured scanning electron micrograph (SEM) of a stem cell from adult bone marrow on the surface of cartilage. Bone marrow is the tissue found in the hollow interior of bones. It makes several different types of cells, including white blood cells (leucocytes), red blood cells (erythrocytes), cartilage cells (chondrocytes) and bone cells (osteocytes). Image width is 42.6 microns.
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