The large intestine, located in the abdomen, is one of the six fu-organs. It joins the small intestine at the ileocolic opening, and ends at the anus. The upper part of the large intestine is the hui (coiling) intestine including the ileum and the upper colon, the lower part is the guang (wide) intestine, including the sigmoid colon and the rectum. Like the small intestine, the large intestine is a hollow and zigzagging tract organ, primarily involved in water absorption of the remaining food residues, feces formation and defecation. The major function of the large intestine is to transmit the waste while absorbing water. The Large Intestine Meridian of Hand-yangming has an exterior-interior relationship with the Lung Meridian of Hand-taiyin.