A meridian is an ‘energy channel’ or an energetic pathway that runs throughout the human body. Think of it as an intricate web of interconnecting energy channels. Qi (chee) energy, or vital force energy flows through this meridian system, and each meridian has many acupuncture points along its path.
The ancient practice of Acupuncture is all about unblocking the energy channels and getting the energy moving throughout the meridians in effort to create more balance and greater function and wellness. Chinese Medicine describes meridians as the energy distribution system, of Qi (energy), blood and body fluids throughout the body.
A good way to think of the meridians is to compare it to our circulatory system, in that they both distribute substances throughout the body. Only the meridian channels are incredibly tiny in comparison to blood vessels. There are many, but there are twelve main meridians which correspond with the organs of the body. These are organs though are energetically processing and aren't the same as the physical, anatomical organs of the body.
The meridian system of the human body is a delicate and intricate web of interconnecting energy channels that need to be moving all the time. When they are not, and when there is stagnancy or blockages, pain and illness and dis-ease can set in. It is important to have ways to keep your energy flowing, since this is truly imperative to staying healthy.