The canal is approximately an inch in length. This article will focus on the anatomy of the external ear its structure neurovasculature and its clinical correlations.
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The first is an outer funnel like structure called the auricle or pinna.
Anatomy of external ear. Under the skin the outer one third of the canal is cartilage and inner two thirds is bone. The second is an s shaped tube called the external acoustic meatus or external auditory canal that leads inward through the temporal bone for about 25 centimeters figure 1. It gathers sound energy and focuses it on the eardrum tympanic membrane.
External ear in human hearing sound waves enter the outer ear and travel through the external auditory canal. Outer external ear the outer ear consists of three parts. The external ear can be divided functionally and structurally into two parts.
Ear anatomy outer ear. The skin of the ear canal is very sensitive to pain and pressure. The outer ear external ear or auris externa is the external portion of the ear which consists of the auricle also pinna and the ear canal.
Ear canal the ear canal starts at the outer ear and ends at the ear drum. Eardrum outer layer also called the tympanic membrane the outer part of the ear collects sound. Sound travels through the auricle and the auditory canal a short tube that ends at the eardrum.
The auricle or pinna and the external acoustic meatus which ends at the tympanic membrane. When the waves reach the tympanic membrane they cause the membrane and the attached chain of auditory ossicles to vibrate.
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