MANFRED KAGE / SCIENCE PHOTO LIBRARY MANFRED KAGE / SCIENCE PHOTO LIBRARY
False colour scanning electron micrograph showing red cells (erythrocytes) and a white cell (lymphocyte) from human blood. The function of the erythrocytes is the distribution & transportation of oxygen & carbon dioxide to & from the cells of the body. Surrounded by a thin elastic membrane, the whole of the interior is filled with the red pigment haemoglobin, which has a good oxygen carrying capacity. Erythrocytes have a biconcave disc shape & are flexible so that they can accommodate themselves to the smallest of capillaries. The function of the lymphocytes is that of defense against disease. Magnification x800 at 6x7cm size.
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