External Ear Anatomy

The auricle and external acoustic meatus or external auditory canal compose the external ear. It gathers sound energy and focuses it on the eardrum tympanic membrane.

Ear Deformities Children S Hospital Of Philadelphia

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.

External ear anatomy. The canal is approximately an inch in length. The ear has outer middle and inner parts. The outer ear consists of three parts.

The first is an outer funnel like structure called the auricle or pinna. The external ear can be divided functionally and structurally into two parts. This article will focus on the anatomy of the external ear its structure neurovasculature and its clinical correlations.

The asymmetric shape of the external auricle introduces delays in the path of sound that assist in sound localization. Ear anatomy outer ear. The external ear functions to collect and amplify sound which then gets transmitted to the middle ear.

Sound travels through the auricle and the auditory canal a short tube that ends at the eardrum. Ear canal the ear canal starts at the outer ear and ends at the ear drum. The auricle or pinna and the external acoustic meatus which ends at the tympanic membrane.

Auricle cartilage covered by skin placed on opposite sides of the head auditory canal also called the ear canal eardrum outer layer also called the tympanic membrane the outer part of the ear collects sound. The motion of the stapes against the oval window sets up waves in the fluids of the cochlea. When the waves reach the tympanic membrane they cause the membrane and the attached chain of auditory ossicles to vibrate.

Under the skin the outer one third of the canal is cartilage and inner two thirds is bone. The skin of the ear canal is very sensitive to pain and pressure. The outer ear includes.

In human hearing sound waves enter the outer ear and travel through the external auditory canal. The ear also functions in the sense of equilibrium.

Human Ear Structure Function Parts Britannica