Gastrointestinal a. : Of or pertaining to the stomach and intestines; gastroenteric.

Example:
Is there a difference between a Gastrointestinal disease and disorder?

Taxonomy
organs, gastrointestinal tract, stomach, GI tract, layer, tract, primitive gut, human gastrointestinal tract, intestines, navs, mucosa, duodenum, digestive system, small intestine, liver, Processes, muscularis externa, esophagus.

Defination from the web:
gastrointestinal tract (GI tract), digestive tract, guts or gut is the system of organs within humans that takes in food, digests it to ... The upper Gastrointestinal tract consists of the mouth, pharynx, esophagus, stomach, and duodenum proximal to the ligament of Treitz (or the ...