Blood cells. Coloured scanning electron micrograph (SEM) of red blood cells (erythrocyte,red) and a single white blood cell (leucocyte yellow). These are the two main cell components of blood and are shown here in the approximate proportions they are present. Erythrocytes are carriers of oxygen and carbon dioxide. Their biconcave surface provides maximum surface area for the exchange of gases. The combined surface area of all red blood cells of the human body would be roughly 2,000 times as great as the body's exterior surface. Leucocytes are involved in the immune system's defence mechanisms,lymph system,and involved in antibody production. Magnification: x1500 when printed 10cm wide | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Gschmeissner, Steve |
Bildgröße: | 4175 px × 4186 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |