The endocannabinoid system is a complex network of lipid-based endocannabinoids (cannabinoids which are produced naturally in the body) and cannabinoid-receptor proteins. The system is distributed throughout the body, including the central nervous system and the peripheral nervous system. The reactions that take place in this system are extremely important for many natural bodily functions, including brain functions. The interactions between endocannabinoids, cannabinoids, and receptors play an important role in physiological and cognitive processes. They also influence mood, emotions, appetite, pain sensation, and memory. Cannabinoids found in the hemp plant interact with this system in similar ways to the body's own natural endocannabinoids.