T-lymphocyte,computer artwork. T-lymphocytes,or T-cells,are a type of white blood cell. They mature in the thymus and play a central role in cell-mediated immunity. There are a number of types. Helper T-cells recognise a specific site on the surface of invading pathogens or foreign objects (antigens),and activate other cells to eliminate them. Cytotoxic T-cells destroy virally infected cells and tumour cells. Other subsets include natural killer T-cells,memory T-cells and regulatory T-cells | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Vernon, Tim |
Taille de l’image : | 4240 px × 4240 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |