in Lymphatic System and Immune System by

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  1. The precursor of lymphocytes are the stem cells (haematoblasts) present in the liver of foetus and in the bone marrow of adult.
  2. Immature lymphocytes are produced from there stem cells by the process of haematopoiesis or  lymphopoiesis.
  3. Some of these get matured in the bone marrow itself and some of them mature in the thymus.
  4. Maturation of B-cells takes place in the bone marrow and final differentiation takes place in the lymphoid tissue of spleen, tonsils, Peyer’s patches of small intestine, appendix, etc.
  5. T-cells are formed from the stem cells in bone marrow and maturation takes place in the thymus.
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