Meatus Anatomy

The internal acoustic canal iac also known as the internal auditory canal or meatus iam is a bony canal within the petrous portion of the temporal bone that transmits nerves and vessels from within the posterior cranial fossa to the auditory and vestibular apparatus. It is located inside the posterior cranial fossa of the skull near the center of the posterior surface of the petrous part of the temporal bone.

Ear Anatomy Parts And Functions Kenhub

It has a bony projection known as the ethmoidal bulla which contains the middle ethmoidal cells.

Meatus anatomy. Meatus may refer to. The meatus has varying degrees of sensitivity to touch. The urinary meatus which is the opening of the urethra situated on the glans penis in males and in the vulva in females.

It is the point where urine exits the urethra in males and in females and also where semen exits the urethra in males. The internal auditory meatus a canal in the temporal bone of the skull. The superior meatus occupies the middle third of the nasal cavitys lateral wall.

The middle meatus is the middle sized and located nasal opening lying underneath the middle concha and above the inferior concha where the meatus extends along its length. Anatomical terminology edit on wikidata the ear canal external acoustic meatus external auditory meatus eam is a pathway running from the outer ear to the middle ear. The size varies considerably.

The external acoustic meatus the opening of the ear canal. Meatus a natural opening of a tubular lumen which in the usual working medical parlance refers to the urinary meatus located in the glans penis or in the vulva. The uncinate process a horn shaped bony projection is located beneath this bulla.

Other meatuses include the external and internal auditory meatuses and the superior middle and inferior meatus of the nose. The opening to the meatus is called the porus acusticus internus or internal acoustic opening. The adult human ear canal extends from the pinna to the eardrum and is about 25 centimetres 1 in in length and 07 centimetres 03 in in diameter.

Meatus definition an opening or foramen especially in a bone or bony structure as the opening of the ear or nose. Meatus a natural body passageway passageway passage a path or channel or duct through or along which something may pass. The urinary meatus also known as the external urethral orifice is the opening of the urethra.

Its outer margins are smooth and rounded. One of the nasal. The nasal passages acoustic meatus auditory canal auditory meatus ear canal external auditory canal either of the passages in the outer ear from the auricle to the tympanic membrane.

Middle meatus situated between the middle and inferior concha the middle meatus extends from the starting to the finishing point of the latter.

Anatomy Ear Outer Middle Inner