Hormones play a crucial role in maintaining the internal environment of the body and are involved in several physiological processes. They contribute to reproduction and sexual differentiation, development and growth, and the maintenance of the internal environment of the body. However, hormones are not involved in maintaining body temperature. Temperature regulation is controlled by the thermoregulatory center in the hypothalamus of the brain, which responds to changes in body temperature and triggers responses to maintain the body temperature within a narrow range.