Hormones are chemical messengers produced by glands in the endocrine system. They travel through the bloodstream to tissues and organs, delivering messages that tell the organs what to do and when to do it. Hormones are vital for regulating major bodily processes, including metabolism, growth and development, mood, sexual function, and reproduction. They play a key role in maintaining homeostasis, the body’s stable internal environment. Examples include insulin, which regulates blood sugar; thyroid hormones, which control metabolism; and cortisol, which is involved in stress response. Hormones are crucial for overall health and well-being.