TIM VERNON / SCIENCE PHOTO LIBRARY TIM VERNON / SCIENCE PHOTO LIBRARY
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.
Model release not required. Property release not required.