Cannabinoid receptors are cell membrane receptors which are found throughout the body. They play key roles in facilitating memory, mood, appetite, and other physiological processes. These receptors are part of the endocannabinoid system (ECS) which aims to preserve homeostasis and is also one of the largest neurotransmitter networks in the human body. There are two kinds of cannabinoid receptors: CB1 (mainly expressed in the central nervous system, lungs, kidneys, and liver) and CB2 ( mainly expressed in the immune system and hematopoietic cells).

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