名詞 digestive tract:

1. tubular passage of mucous membrane and muscle extending about 8.3 meters from mouth to anus; functions in digestion and elimination
   同義詞：alimentary canal, alimentary tract, digestive tube, gastrointestinal tract, GI tract

1. The excretory opening of the digestive tract in animals such as birds, reptiles, amphibians, and fish.
   肛門鳥、爬行動(dòng)物、兩棲動(dòng)物以及魚等動(dòng)物的消化道的排泄口