What role do prostaglandins primarily serve in the human body?

Prostaglandins play a critical role in the regulation of various bodily functions. They are lipid compounds that have hormone-like effects and are involved in a myriad of physiological processes, including inflammation, blood flow, the formation of blood clots, and the induction of labor. By affecting smooth muscle contraction, modulating immune responses, and acting on the nervous system, prostaglandins serve as key regulators rather than being directly involved in energy storage, hormone production, or blood cell formation. Their ability to influence such a wide range of functions highlights their importance in maintaining homeostasis within the body.