digestive tract vs digestive tube

digestive tract and digestive tube both are nouns.

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

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

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

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

digestive tract (noun)	digestive tube (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