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A lymphocyte is a type of white blood cell. White blood cells are part of your immune system and help your body fight off diseases, including infections and cancer. There are two main types of lymphocytes â B cells and T cells.
Lymphocytes are a type of white blood cell generated by the immune system to defend the body against cancerous cells, pathogens, and foreign matter. Lymphocytes circulate in blood and lymph fluid and are found in body tissues including the spleen, thymus, bone marrow, lymph nodes, tonsils, and liver. cells. T cells develop from liver or bone marrow stem cells that mature in the thymus. These cells play a major role in cell mediated immunity. T cells contain proteins called T-cell receptors that populate the cell membrane.