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.
The lymphatic system is an interconnected system of vessels, nodes, and spaces in the body. Lymph nodes help isolate the agent responsible for sickness in the body. Swollen lymph nodes are one of the first signs of illness. The lymphatic system, shown in green.