False-colour transmission electron micrograph (TEM) of a human monocyte,a type of white blood cell. Monocytes appear to have little function in blood,but are highly mobile & migrate into tissues where they are known as macrophages. In addition to scavenging & engulfing (phagocytosing) cellular debris & microorganisms,a macrophage is capable of processing antigenic (foreign) substances during the initial phase of immune response. Processed antigens are presented on the macrophage's surface for recognition & elimination by other white cells. Magnification: x12,150 at 6x7cm size,x5,400 at 35mm size | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / CNRI |
Taille de l’image : | 3551 px × 2744 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |