Blood cells. Coloured scanning electron micrograph (SEM) of a variety of different white blood cells (leucocytes,yellow/green) with two red blood cells (erythrocytes,red) and a few platelets (pink). White blood cells are involved in defending the body against both infectious disease and foreign materials. The main function of red blood cells is to distribute oxygen to body tissues and to carry waste carbon dioxide back to the lungs. Platelets,or thrombocytes,are fragments of white blood cells. When blood clots,red blood cells (erythrocytes) are trapped within a fibrin protein mesh (beige),which is formed in response to chemicals secreted by the platelets. Magnification: x2000 when printed at 10 centimetres wide | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Gschmeissner, Steve |
Bildgröße: | 4588 px × 3807 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |