POWER AND SYRED / SCIENCE PHOTO LIBRARY POWER AND SYRED / SCIENCE PHOTO LIBRARY
Blood cells. Coloured scanning electron micrograph (SEM) of red blood cells (erythrocytes, pink) and a white blood cell (leucocyte, blue). The disc- shaped erythrocytes transport oxygen to the body cells and remove carbon dioxide to the lungs. The leucocyte is part of the immune system, defending the body against infection by digesting pathogens or secreting antibodies. Magnification: x3550 at 6x7cm size.
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