 Important symbolic functions are performed by the five viscera (wuzang), namely the liver, heart, spleen, lungs, and kidneys. They are related, in this order, to the agents Wood, Fire, Soil, Metal, and Water. This makes the viscera the main support for the macrocosm-microcosm doctrine in Daoism. The three Cinnabar Fields and the five viscera respectively reproduce the vertical and horizontal dimensions of the cosmos within the human being.