Where are meridians located?
There are 20 meridians that run roughly parallel along the surface of the body and connect some of the acupuncture points. In the 1960s, Professor Kim Bong Han, working in Korea, found evidence using microdissection techniques of an independent series of fine duct-like tubes corresponding to the paths of traditional acupuncture meridians. The fluid in this system sometimes traveled in the same direction as blood and lymph and at other times in the opposite direction. Kim concluded that the meridians might exist within these duct-like tubes. The French researcher Pierre de Vernejoul corroborated these findings in 1985, by injecting radioactive isotopes into the acupoints in humans and tracking their movement. He found that the movement of the isotopes corresponded to the acupuncture meridians.
