alimentary canal, alimentary tract, digestive tract, digestive tube, gastrointestinal tract, GI tract - tubular passage of mucous membrane and muscle extending about 8.3 meters from mouth to anus; functions in digestion and elimination

bowel, gut, intestine - the part of the alimentary canal between the stomach and the anus

colon - the part of the large intestine between the cecum and the rectum; it extracts moisture from food residues before they are excreted

blind gut, caecum, cecum - the cavity in which the large intestine begins and into which the ileum opens; "the appendix is an offshoot of the cecum"

transverse colon - the part of the large intestine that extends across the abdominal cavity and joins the ascending to the descending colon

ascending colon - the part of the large intestine that ascends from the cecum to the transverse colon

descending colon - the part of the large intestine that descends from the transverse colon to the sigmoid colon

sigmoid colon, sigmoid flexure - the s-shaped curve between the descending colon and the rectum

rectum - the terminal section of the alimentary canal; from the sigmoid flexure to the anus