Killer Cells

Killer cells are cytotoxic T cells or natural killer cells present in the blood that recognize certain cells and cause their death. The target cells are, for example, cells affected by pathogens or cancer cells. - Both cell types use similar mechanisms, but recognize the altered body cells by completely different characteristics.Jede Killer cell has many receptors of the same type on its surface. A killer cell "kills" only one type of antigen, the one that matches its receptor. Therefore, the immune system has a large number of different T-killer cells at its disposal to detect all conceivable forms of antigens. T-killer cells destroy the body's own cells in which pathogens have nested on the orders of the T-helper cells.