Generally we are taught about 11 systems of the human body such as the digestive, nervous, circulatory systems, and so forth. But there is also another one called the endocannabinoid system, which has cannabinoid receptors. CBD stands for cannabidiol and hemp is rich in them. The CB 1 and CB 2 cannabinoid receptors in the body bind with the molecules of CBD and produce positive biological responses, namely bringing about homeostasis (balance) in all the other body systems. Yay for balance!