Beginner Biology Guide
What Is the Endocannabinoid System?
A simple map of the body's endocannabinoid signals, receptors, and enzymes, plus the source-backed pages for each part.
The short answer
What should you know first?
The endocannabinoid system is a signaling network in the body. It includes endocannabinoids made by the body, receptors such as CB1 and CB2, and enzymes that make or break down those signals. Plant cannabinoids can interact with parts of this network, but they are not the whole system.
Parts of the system
Three pieces to keep separate
Key distinction
Signals
Anandamide and 2-AG are two important endocannabinoids made by the body.
Key distinction
Receptors
CB1 and CB2 are two major cannabinoid receptors, but cannabinoid biology also involves other targets.
Key distinction
Enzymes
Enzymes such as FAAH and MAGL help control how long endocannabinoid signals last.
Important limits
What can make the answer change?
- 1
Do not treat a receptor mechanism as proof that a cannabinoid improves a health outcome.
- 2
Do not call CBD, THC, or another plant cannabinoid an endocannabinoid made by the body.
- 3
Do not reduce all cannabinoid biology to CB1 and CB2; other receptors, channels, and enzymes can matter.