Question

The external auditory canal is a cul-de-sac 2.5 to 3 cm long in the adult and terminates at the:_____.

Answer 1

The External auditory canal is a cul-de-sac 2.5 to 3 cm long in the adult and terminates at the Tympanic membrane.

The External auditory canal is an S- shaped Osseo-cartilaginous structure that extends from the auricle to the tympanic membrane. Congenital, inflammatory, neoplastic, and traumatic lesions can affect the external auditory canal. The main function of the External auditory canal is to conduct sound waves in the form of vibrations to the tympanic membrane. The most common congenital lesion affecting the External auditory canal is atresia.

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