What is the primary function of hormones in the body?

Hormones play a crucial role in the body as regulators of physiological processes and coordinators of various bodily functions. They are chemical messengers released into the bloodstream by endocrine glands, carrying signals to distant target organs and tissues to initiate specific biological responses. This regulation encompasses a wide variety of processes, including metabolism, growth and development, immune function, stress response, and reproductive functions.

For instance, insulin is a hormone that regulates blood sugar levels, while thyroid hormones influence metabolic rates. By ensuring that these processes are finely tuned and coordinated, hormones maintain homeostasis within the body. This overarching regulatory function distinguishes hormones from other biological molecules that serve different purposes, such as providing structural support or facilitating transport of molecules like oxygen.