xiàguǎn (下管)

literally means “lower tube” or even possibly “descending tube;” the last phrase of Língshū 47.20 mentions shàngguǎn (上管), which is the complementary upper or ascending tube, or it may refer to the upper duct of the stomach or the acupuncture point Wèiguǎn (胃管, Ren 13); xiàguǎn (下管) may likewise refer specifically to the lower duct of the stomach, or to the lower portion of the alimentary canal.

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