foregut

詳細解釋：

fore.gut

n.（名詞）
The anterior part of the embryonic alimentary canal of a vertebrate from which the pharynx, lungs, esophagus, stomach, liver, pancreas, and duodenum develop.
前腸：脊椎動物消化道的前部，由此產生出咽、肺、食管、胃、肝臟、胰和十二指腸
The first part of the alimentary canal of an arthropod or annelid, which includes the buccal cavity, esophagus, crop, and gizzard.
前腸：節肢動物或環節動物的消化道的第一部分，包括口腔、食管、嗉囊和砂囊