On Earth, a is a line of constant longitude from North to South Pole.
The most widely accepted modern theory is the , which states that acupuncture's clinical effects are primarily transmitted through stimulation of sensory nerves that send signals to the brain, which then initiates therapeutic changes in the body . Research has shown that acupoints often overlie major neuronal bundles. For example: meridian coordinates
Your phone uses these coordinates to show your exact position. On Earth, a is a line of constant