The cannabis plant is being studied now more than ever in history and the science is in. This lecture shares the latest discoveries in the endocannabinoid system, including the different cannabinoid receptors throughout the body and their interactions with endocannabinoids, phytocannabinoids as well as terpenoids and flavonoids. This deep understanding is essential to cannabis therapies. The lecture covers the newest research and current applications in general cannabis medicine. Veterinary species is covered in more detail in the next lecture, Introduction to Veterinary Cannabis Therapy.