- Anatomy, Zoology. a tubular passage functioning in the digestion and absorption of food and the elimination of food residue, beginning at the mouth and terminating at the anus.
- the tubular passage extending from the mouth to the anus, through which food is passed and digested
- The mucous membrane-lined tube of the digestive system that extends from the mouth to the anus and through which food passes, digestion takes place, and wastes are eliminated; it includes the pharynx, esophagus, stomach, and intestines.alimentary tract digestive tract
- The tube or passage of the digestive system through which food passes, nutrients are absorbed, and waste is eliminated. See also digestive tract.