Blood cells. Coloured scanning electron micrograph (SEM) of red blood cells (erythrocytes,red) and a single white blood cell (leucocyte,centre). Red blood cells are carriers of oxygen and carbon dioxide. Their biconcave surface provides maximum surface area for the exchange of gases. There are a number of different types of white blood cell,all of which are part of the immune system. Magnification: x4400 when printed 10 centimetres wide | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Power And Syred |
Bildgröße: | 4789 px × 3672 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |