The esophagus is a long tube going from the pharynx to the stomach, and it's connected to the pharynx through the upper esophageal sphincter, and to the stomach through the lower esophageal sphincter.

食管是连接咽部和胃的长管，上端借食管上括约肌与咽部连接，下端借食管下括约肌与胃连接。