Assertion: temporal bone's part | /r/HasProperty | the mesotympanum
Facets:
Source sentences:
text: The middle ear may be divided into three parts: the mesotympanum, or the tympanic cavity proper, which is opposite the tympanic membrane and contains the three ossicles; the epitympanum, or the attic, which is cephalad to the tympanic membrane; and the hypotympanum, which is inferior to the tympanic membrane.