T-Lymphocytes

**Definition:** Lymphocytes responsible for cell-mediated immunity. Two types have been identified - cytotoxic (T-LYMPHOCYTES, CYTOTOXIC) and helper T-lymphocytes (T-LYMPHOCYTES, HELPER-INDUCER). They are formed when lymphocytes circulate through the THYMUS GLAND and differentiate to thymocytes. When exposed to an antigen, they divide rapidly and produce large numbers of new T cells sensitized to that antigen.

**Tree numbers:** - A11.118.637.555.567.569 - A15.145.229.637.555.567.569 - A15.382.490.555.567.569

**Synonyms:** - T Cell - T Lymphocyte - Thymus-Dependent Lymphocytes - T-Cells