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Noun. 1. cytotoxic T cell-T cell with CD8 receptor that recognizes antigens on the surface of a virus-infected cell and binds to the infected cell and kill it. CD8 cell, CD8 T cell, killer cell, killer T cell. T cell, T lymphocyte-a small lymphocyte developed in the thymus; it orchestrates the immune system's response to infected or malignant cells.
Helper T cells are the mediators of the immune system, they carry information and decide when to give the green light to other immune cells to carry out an immune response. Helper T cells can only bind to swallowing cells like the macrophage and the B cell. cells are like the police chiefs of white blood cells. T cells are white blood cells called lymphocytes. There are many different types of T cells that all perform different functions, but among the most important are Helper T cells and Killer T cells.