Spider monkeys are among the largest New World monkeys; black-headed spider monkeys, the largest spider monkey, have an average weight of 11 kilograms (24 lb) for males and 9.66 kg (21.3 lb) for females.
IMMUNE SYSTEM. -responsible for protecting the body against bacteria, viruses, fungi, toxins, parasites, and cancer. -works with organs of lymphatic system, thymus, spleen, and lymph nodes, to clear body of these disease causing agents. LYMPHATIC SYSTEM.
It is the cleaner of the body consisting of four organs: the lymph nodes, tonsils, thymus and spleen. Although dispersed throughout the entire body, the heaviest concentration of lymph nodes are in the cervical spine, the armpit or axillary area and the groin or inguinal region.