One of two longitudinal ridges that develop caudal to the pharynx and fuses to give rise to the tracheoesophageal septum. [ https://web.duke.edu/anatomy/embryology/gi/gi.html http://purl.obolibrary.org/obo/UBERON_cjm ]
Synonyms: esophagotracheal fold
This is just here as a test because I lose it