The intermediate portion of the ear which consists of a small air-filled and membrane-lined chamber. It is lodged in the temporal bone and continues with the nasopharynx through the Eustachian tube. It is separated from the external ear by the tympanic membrane and from the inner ear by the fenestrae.
hog:0000461
auditory ossiclehog:0000698
tensor tympani musclehog:0000813
levator operculi - stapedius musclehog:0001145
auditory tubehog:0001146
tympanic membranehog:0001297
tubotympanic recessBFO:0000050
part of
hog:0000330