What does the endocrine system do?

The endocrine system is primarily responsible for producing and releasing hormones, which are chemical messengers that regulate various bodily functions. Hormones play critical roles in processes such as growth and development, metabolism, and mood regulation. They are secreted directly into the bloodstream by endocrine glands, such as the thyroid, adrenal glands, and pancreas, where they travel to target organs and tissues to exert their effects.

While filtering toxins from the blood is a function of the renal system (involving the kidneys), muscle movements are controlled by the muscular and nervous systems, and oxygen exchange occurs in the respiratory system. Each of these systems performs distinct and vital roles in maintaining homeostasis, but the unique function of the endocrine system is its ability to communicate and regulate bodily functions through hormone secretion. This makes the role of hormone production and release central to the understanding of the endocrine system's function.