When we talk about Cannabis we mean the entire plant. According to some researchers Cannabis can be divided in two species: Indica and Sativa.Phytocannabinoids are cannabinoids present in the Cannabis, amongst which CBD and THC.Endocannabinoids are neuromediators which are generated in our body. The two best known and studied most are N-arachidonylethanolamide (anandamide, AEA) and 2-arachidonoylglycerol (2-AG).Cannabinoid receptors are specific binding sites for cannabinoids and are distributed on the surface of many types of cells. Scientific research has discovered two types of receptors: CB1 and CB2. CB1 are mainly found on the nervous cells of the CNS, while the CB2 receptors are mainly found on the immunocompetent cells.