The meridians function in pairs of one Yang and one Yin meridian. Yang energy comes from the sun and flows from the fingers down the face and body. Yang meridans are the large intestine, stomach, small intestine, bladder, triple heater and gall bladder. The qi in the Yin meridians flows from the earth up the body and face to the fingertips. Yin meridians are the lung, spleen, heart, kidney pericardium and liver.