Final answer:
Lymphocyte recirculation is the process by which lymphocytes move out of secondary lymph structures and travel through the circulatory and lymphatic systems to search for pathogens. B cells differentiate into plasma cells which often return to the bone marrow after generating a response. Lymphocytes are responsible for mounting adaptive immune responses and can be found in lymph nodes, spleen, and other parts of the body.
Step-by-step explanation:
Lymphocytes do not stay in secondary lymph structures permanently but move out after several days. This process is referred to as lymphocyte recirculation.
After maturing in the bone marrow or thymus, lymphocytes enter the circulatory system and then the lymphatic system to search for pathogens. Once activated, B cells differentiate into plasma cells which often leave the secondary lymphoid organs and migrate back to the bone marrow.
Lymphocytes are responsible for mounting adaptive immune responses and can be found in various parts of the body, including lymph nodes and spleen. They circulate between these sites through the bloodstream and lymph, constantly surveilling for potential threats.