GI tract

The gastrointestinal tract (GI tract), also called the digestive tract, or the alimentary canal, is the system of organs within multicellular animals that takes in food, digests it to extract energy and nutrients, and expels the remaining waste. The major functions of the GI tract are ingestion, digestion, absorption, and excretion.
See more at Wikipedia.org...

Gastrointestinal tract n. The part of the digestive system consisting of the stomach, small intestine, and large intestine. [more]GI tract - Community and Resources

Noun
1. tubular passage of mucous membrane and muscle extending about 8.3 meters from mouth to anus; functions in digestion and elimination
(synonym) alimentary canal, alimentary tract, digestive tube, digestive tract, gastrointestinal tract
(hypernym) duct, epithelial duct, canal, channel
(hyponym) enteron
(part-holonym) digestive system, gastrointestinal system, systema alimentarium, systema digestorium
(part-meronym) stomach, tummy, tum, breadbasket

an area of the body that includes the stomach and intestines.