What is the role of hormones in the body?

Hormones play a crucial role in the body primarily by acting as chemical messengers. They are secreted by specific glands and released into the bloodstream, where they travel to target organs or tissues to regulate various physiological processes. These functions include managing metabolism, regulating growth and development, controlling mood, and maintaining homeostasis. For instance, insulin, a hormone produced by the pancreas, helps regulate blood sugar levels, while hormones like adrenaline prepare the body for fight-or-flight responses.

While hormones may influence muscle contractions indirectly through factors such as the availability of energy substrates or neurological signals, they do not directly initiate muscle contractions. Likewise, the transport of nutrients is primarily the role of the circulatory system and not a direct function of hormones. Lastly, structural support in the body is mainly provided by tissues like bone and cartilage, rather than hormones. Thus, the function of hormones as chemical messengers is fundamental to their role in maintaining bodily functions and overall health.