Function of five viscera and six bowels are different but when finishes certain function, viscera must be coordination with each other such as absorption and excretion of moisture content. Processes that from water put into mouth to moisture content rows out of body can not be finished by one viscus; it needs concomitance contribution of many viscera.

There is coordination of eight viscera which include stomach, spleen, lung, small intestine, large intestine, triple energizer, kidney and bladder, if qi transformation function of one viscus is aberration, it will impact evacuation of moisture content. Coordination function of organs is completed by meridians and collaterals.