Which organ system includes the spleen?AReproductive systemBNervous systemCLymphatic systemDNone of theseAnswer: C. Lymphatic systemRead Explanation:The lymphatic system is a network of very small tubes (or vessels) that drain lymph fluid from all over the body. The major parts of the lymph tissue are located in the bone marrow, spleen, thymus gland, lymph nodes, and the tonsils. The heart, lungs, intestines, liver, and skin also contain lymphatic tissue. Open explanation in App