<P> The thymus and the bone marrow constitute the primary lymphoid organs involved in the production and early clonal selection of lymphocyte tissues . Bone marrow is responsible for both the creation of T cells and the production and maturation of B cells . From the bone marrow , B cells immediately join the circulatory system and travel to secondary lymphoid organs in search of pathogens . T cells , on the other hand , travel from the bone marrow to the thymus , where they develop further . Mature T cells join B cells in search of pathogens . The other 95 % of T cells begin a process of apoptosis , a form of programmed cell death . </P>
<P> The thymus and the bone marrow constitute the primary lymphoid organs involved in the production and early clonal selection of lymphocyte tissues . Bone marrow is responsible for both the creation of T cells and the production and maturation of B cells . From the bone marrow , B cells immediately join the circulatory system and travel to secondary lymphoid organs in search of pathogens . T cells , on the other hand , travel from the bone marrow to the thymus , where they develop further . Mature T cells join B cells in search of pathogens . The other 95 % of T cells begin a process of apoptosis , a form of programmed cell death . </P>
the primary gland of the lymph system is the
the primary gland of the lymph system is the
thymus bone marrow
thymus bone marrow