Red and white blood cells,coloured scanning electron micrograph (SEM). Polymorphonuclear white blood cell (leucocyte) surrounded by red blood cells (erythrocytes). Red blood cells are biconcave,disc-shaped cells that transport oxygen throughout the body. Polymorphonuclear leucocytes are any of several types of white blood cells produced in the bone marrow,which form 70% of human white blood cells. They play an important role in the immune system,migrating to areas of tissue damage and engulfing foreign bodies such as bacteria. Magnification unknown | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Nikas, Dr. Yorgos |
Taille de l’image : | 4500 px × 3390 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |