What are hormones primarily known as?

Hormones are primarily known as chemical messengers because they are substances produced by endocrine glands that are secreted directly into the bloodstream. Once in the circulatory system, hormones travel to various tissues and organs to regulate a wide range of physiological processes. This function includes influencing metabolism, growth and development, mood, and immune function, among others.

The term "chemical messengers" highlights their role in transmitting signals between cells and organs, facilitating communication within the body to maintain homeostasis. This precise signaling is crucial for coordinating complex bodily functions, highlighting why the classification of hormones as chemical messengers is essential in understanding their impact on overall health and physiology.