Responsible in regulating physiological processes and adjustments in metabolism, fluid balance, growth and reproduction. › Works closely with the Nervous System. The study of the Endocrine System is called Endocrinology.
Hormones – chemical messengers produced and secreted by endocrine glands responsible for the regulation of body processes. They stimulate specific tissues to do processes.
Leptin – lowers appetite, increases metabolism Orexin – stimulates awakeness Parathyroid hormone – increases blood Ca2+ Testosterone – libido, increase in muscle mass and strength
Responsible for defending the body from foreign materials that cause diseases, called pathogens. › Immunology is the study of the Immune System. › Vertebrates are special because they have WBCs that are specialized in carrying out immune responses.
Antigens – causes the production of the antibodies Antibodies – identifies and neutralizes foreign materials like bacteria or viruses