The external auditory canal is a curved pipe from the external auditory canal to the tympanic membrane, and the external 1/3 is cartilage and the internal 2/3 is bone. The inner surface of the external auditory canal is covered with a layer of skin.

Suggestion:

Adult external ear is long and oblique, which is not easy to be infected; The physiological characteristics of children's ears are short external auditory canal and horizontal ear canal, which is easy to be infected.