关键词: 经络实质, 低阻经络, 疏松结缔组织, 间液（组织液）

Abstract: As a result of the 4-skin-electrode measurement of the electrical resistance at different points, it disclosed that there were many meridians with lower electrical resistance in the sub-skin regions of human body. A comparison of the skin locations of the lower resistance meridians with those of the corresponding (classical acupuncture) meridians resulted in such high an agreement that could not be accidental, and thus established the objective physiological reality of the meridians. In the present paper, on the basis of meridian's lower electrical resistance and according to the well-known facts in physiology, the author argued that the essence of the meridians were only zones in the loose connective tissue but containing relatively richer interstitial fluid (tissue fluid) and thus exhibiting lower electrical resistance.

Key words: essence of acupuncture meridian, low-resistance meridian, loose connective tissue, interstitial fluid (tissue fluid)