What Is the Endocannabinoid System?
Let’s look at the word “endocannabinoid.” “Cannabinoid” comes from “cannabis,” and “endo” is short for “endogenous,” which means that it is produced naturally inside of your body. So “endocannabinoid” simply means cannabis-like substances that naturally occur inside us, or naturally occurring cannabinoids within our own bodies.
The ECS itself is made up of three parts:
- Receptors in the nervous system and around your body that endocannabinoids and cannabinoids bond with
- Enzymes that help break down endocannabinoids and cannabinoids
Not only is the ECS a natural part of our bodies, but it’s also a crucial one, often considered the master regulatory system. You may have heard a lot of claims about the medicinal properties of CBD, THC or marijuana in general. With so many seemingly unrelated effects, you might wonder whether it’s just a lot of hype from people who want the drug legalized; however, medical science backs up many of these claims, and the reason for the far-reaching effects have to do with the size and scope of the endocannabinoid system itself.
The Endocannabinoid System: Crucial for Homeostasis
To understand the ECS, it first helps to understand what homeostasis is.
Basically, homeostasis is your body’s efforts to keep everything in balance. It tries to keep your internal environment stable and optimal no matter what’s going on in the environment around you. Think of all the gauges in the dashboard of a car or airplane. Those all tell the operator whether things are—or aren’t—operating properly or in balance. When something isn’t operating properly, your body activates the ECS to help correct it.
The ECS does this via cannabinoid receptors found in select tissues. We have (at least) two types of cannabinoid receptors:
- CB1 which is in the central nervous system (brain and nerves of the spinal cord)
- CB2 which is in the peripheral nervous system (nerves in your extremities), the digestive system, and specialized cells in the immune system
Cannabinoid receptors are believed to be among the most plentiful in our central nervous system, and some researchers hypothesize that we could have a third, undiscovered one, as well.
Through those receptors, the ECS helps regulate a lot of important functions, such as:
- Immune function
- Inflammation, including neuroinflammation
- Motor control
- Temperature regulation
Your body activates the ECS with precision so that it impacts only what it needs to. For example, if your reproductive hormones are out of whack, it will work to regulate them without altering your digestion or immune system.
Then, once the endocannabinoids have done their job and brought things into balance, certain enzymes come along to break them down and prevent them from going too far and upsetting the balance in the opposite direction. It’s a precise response.
That’s different from what happens if someone smokes marijuana and floods their system with cannabinoids. Then the drug has wide-ranging impacts on physiology, some of which may be beneficial while others may be harmful.
Homeostasis is essential to our health and survival, so when the ECS isn’t working properly, it can cause a lot of problems for you.