Question: yin has how many meridians?
Answer: In total, there are three yin meridians (heart, lung, and pericardium) and three yang meridians (small intestine, large intestine, and sanjiao) of the arm, as well as three yin meridians (liver, kidney, spleen) and three yang meridians (urinary bladder, gall bladder, and stomach) of the leg. Yin and yang meridians.