meatus acusticus internus
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Related to meatus acusticus internus: Internal Auditory Canal
in·ter·nal a·cous·tic me·a·tus[TA]
a canal beginning at the opening of the internal acoustic meatus in the posterior cranial fossa, passing laterally through the petrous portion of the temporal bone to end at the fundus, where a thin plate of bone separates it from the vestibule; it gives passage to the facial and vestibulocochlear nerves together with the labyrinthine artery and veins.
meatus(me-a'tus) plural.meatus [L.]
A passageway or an opening. meatal (me-a'tal), adjective
The opening to either the external or internal auditory canal. It can also be a synonym for either the external or internal auditory canal.
meatus acusticus externusExternal auditory canal.
meatus acusticus internusInternal auditory canal.
external acoustic meatusExternal auditory meatus.
external auditory meatus
The outer opening of the external auditory canal, or the canal itself.See: external acoustic meatus.
internal acoustic meatusInternal auditory meatus.
internal auditory meatus
The opening of the internal auditory canal into the cranial cavity located on the posterior surface of the petrous portion of the temporal bone, or the canal itself.Synonym: internal acoustic meatus
meatus nasi communis
Common nasal cavity on either side of septum, into which three meatus open.
meatus nasi inferior
Space beneath inferior turbinate or concha of the nose.
meatus nasi medius
Space beneath middle turbinate or concha of the nose.
meatus nasi superior
Space beneath superior turbinate or concha of the nose.
Posterior portion of nasal cavity, which communicates with the nasopharynx.
External opening of the urethra.Synonym: urinary meatus; meatus urinarius