Answer:
Lymphatic system serves as site for production and maturation of lymphocytes.
Explanation:
Primary lymphoid organs of lymphatic system serves as site for production and maturation of lymphocytes which differentiate into B and T lymphocytes. Lymphatic system serves as first line of defense against infections since it transports antibodies, lymphocytes and pathogen along with lymph. Lymphocytes encounter the pathogens in secondary lymphoid tissues and proliferate to become actively involved cells. Spleen serves to filter the blood and presents the pathogens to lymphocytes and macrophages which in turn kill the pathogens.
