gastrointestinal tract vs digestive tract

gastrointestinal tract and digestive tract both are nouns.

Word	Noun	Adjective	Verb	Adverb
gastrointestinal tract	Yes	No	No	No
digestive tract	Yes	No	No	No

As nouns, gastrointestinal tract and digestive tract are synonyms defined as:

gastrointestinal tract and digestive tract: tubular passage of mucous membrane and muscle extending about 8.3 meters from mouth to anus; functions in digestion and elimination

Other synonyms of gastrointestinal tract include alimentary canal, alimentary tract, digestive tube, GI tract.

gastrointestinal tract (noun)	digestive tract (noun)
tubular passage of mucous membrane and muscle extending about 8.3 meters from mouth to anus; functions in digestion and elimination	tubular passage of mucous membrane and muscle extending about 8.3 meters from mouth to anus; functions in digestion and elimination