Water

All the vital fluids of the body, especially the clear fluids: phlegm, mucus, plasma, lymph and serous & interstitial fluids. The kidney, bladder and urinary tract, which pass superfluous water from the body. The mucosa of the digestive, respiratory and genitourinary tracts. The lymphatic system. The brain and spinal cord.
In the aspects of human Physiology, water is attributed to tendency (drooping), bodily system (muscles), excretion (urine), sense ( taste), bodily function (nutrition), mentality (phlegmatic) and mental state (submission and affection).