Demystifying the endocannabinoid system. | Ruth Ross | TEDxMississauga February 25, 2021 cbdnews How Marijuana Works Comments Off on Demystifying the endocannabinoid system. | Ruth Ross | TEDxMississauga Dr. Ruth Ross describes what happens in the brain when introduced to tetrahydrocannabinol (THC), one of the primary ingredients in cannabis. This talk was …