Lymphoid organ

These are organs where lymphocytes develop, proliferate and undergo gene rearrangement. There are two sub catogries of lymphiod organs.The Central/ primary lymphiod organs this is where lymphocytes are synthesized, these organs incude the bone marrow and thymus, and are located in the upper chest. The preipheral/ secondary lymphoid organ, which is where mature naive lymphocytes are managed and the specific immune response commence; these organs include lymph nodes, the nasal and resipartory tract, the urogentital tract etc.