There are twelve main meridians throughout the body through which Qi (or energy) flows. Each limb is traversed by six channels, three Yin (on the inside), and three Yang (on the outside). Each of the twelve regular channels corresponds to five Yin organs, six Yang organs, the Pericardium, and San Jiao. It is important to remember that these are not western “organs” but relate to processes in the body.
When a meridian has a balanced flow of chi the corresponding organs and body systems will have a better chance of operating optimally. To cultivate this and balance this flow acupuncture points (acupoints) along each of the meridians are activated to dissipate any obstructions by inserting fine needles into them or applying other forms of stimulation.