What are cannabinoid receptors? Cannabinoid receptors are active sites that are found within different parts of the body, each with a unique function that contributes to the balance of an internal environment. It is this definition that leads one to ask exactly what the relationship with Cannabis is all about, especially once you notice that the name of this system is derived (in part) from the active ingredients of the Cannabis plant. It is interesting to note that just about all vertebrate ...