Red blood cells, SEM

Bildnummer 12554723
Red blood cells, SEM
Coloured scanning electron micrograph (SEM) of red blood cells (RBCs, erythrocytes). Red blood cells are biconcave, disc-shaped cells that transport oxygen from the lungs to body cells. They circulate in the blood and also remove carbon dioxide to the lungs for exhalation. Their red colour is due to the oxygen-carrying protein haemoglobin. Red blood cells, the most abundant cell in the blood, have no nucleus and are about 7 micrometres across. Magnification: x3500 when printed at 10 centimetres across.
Lizenzart: Lizenzfrei
Credit: Science Photo Library / Gschmeissner, Steve
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