What is the Endocrine System?

Your endocrine system is made up of both the glands that secrete chemical messengers, called hormones, and the organs that detect and are affected by the hormones. Hormones regulate your internal environment by working with every other system in your body to coordinate and direct the activities of your cells. Although their work is done at the cellular level, the cumulative effect of hormones impacts major bodily functions like growth, sleep, body temperature, maturation, and metabolism.