tubotympanic recess

tu·bo·tym·pan·ic re·cess

the dorsal portion of the embryonic first endodermal pharyngeal pouch; it develops into the middle ear cavity.
Farlex Partner Medical Dictionary © Farlex 2012
References in periodicals archive ?
It is derived from the first pharyngeal pouch, which during embryogenesis forms the tubotympanic recess. The distal part of the tubotympanic recess gives rise to the tympanic cavity, while the proximal tubular structure becomes the auditory tube.