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.
Body Systems and Homeostasis. The internal environment of the body is tissue fluid, which bathes all cells making up the body. The composition of tissue fluid must remain constant if cells are to remain alive and healthy. Tissue fluid is nourished and purified when molecules are exchanged across thin capillary walls.. Use regulation of normal blood pressure to illustrate how the nervous system and the endocrine systems are both involved in maintaining homeostasis. 4. Use the regulation of blood pH to illustrate that there are short-term and long-term mechanisms for maintaining homeostasis. 5.