foregut
noun
fore·gut ˈfȯr-ˌgət 
: the anterior part of the digestive tract of a vertebrate embryo that develops into the pharynx, esophagus, stomach, and extreme anterior part of the intestine
Example Sentences
Recent Examples on the Web Scanning electron micrograph depicting a mass of Yersinia pestis bacteria (the cause of bubonic plague) in the foregut of the flea vector. 
Evan Bush, NBC News, 15 June 2022 As Taylor explains to Osborne, O. quadrata’s three main stomach teeth rub against each other to grind up food in the animal’s foregut. Meilan Solly, Smithsonian, 12 Sep. 2019
Evan Bush, NBC News, 15 June 2022 As Taylor explains to Osborne, O. quadrata’s three main stomach teeth rub against each other to grind up food in the animal’s foregut. Meilan Solly, Smithsonian, 12 Sep. 2019 Word History
First Known Use
1875, in the meaning defined above
Medical Definition
foregut
noun
fore·gut -ˌgət
1
: the anterior part of the digestive tract of a vertebrate embryo that develops into the pharynx, esophagus, stomach, and extreme anterior part of the intestine
2
: the anterior part of the definitive digestive tract of an invertebrate animal