Large Intestine Channel

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What tissue does the Large Intestine primary channel enter?

Root of the tongue
Eye
Upper gums
Lower gums

The Large Intestine channel enters the lower gums; the Stomach channel enters the upper gums. You can maybe remember the the Large Intestine organ is lower in the body than the Stomach organ, so the LI channel enters the lower gums.

Source: "The Large Intestine Channel of Hand Yangming." A Manual of Acupuncture, by Peter Deadman et al., Journal of Chinese Medicine Publications, 2007, p. 95 [Q148]