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