Humans and animals are born with a system of cannabinoid receptors mapped throughout the body and brain. Cannabinoid receptors play a crucial role in a number of processes in the human body, including regulating memory, pain, appetite and mood.
Once activated, these receptors enable two-way communication between the systems of the body by activating other receptors such as serotonin, adenosine and vanilloid.
This system is known as the endocannabinoid system (ECS)