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White blood cells known as lymphocytes arise from by mitosis of stem cells in the bone marrow. Some lymphocytes migrate to the thymus and become T cells that circulate in the blood and are associated with the lymph nodes and spleen.
Answer by Jameelaiahmed. Confidence votes 320. Lymphocytes are a type of small white blood cell present in the human immune system. These small cells play a very large and important role in fighting diseases in the human body. There are basically two types of lymphocyte cells: B-cells and T-cells.he lymphocyte is the main cell of the lymphoid tissue. Lymphocytes are a type of white blood cell which produce antibodies to kill any pathogens which invade the body. They a â¦ re small white blood cells which have large nuclei, but no granules.