Anatomy of Ear

by dr_totti Wed Mar 19, 2008 9:51 am

Definitions of Parts Shown Above

Helix - The in-curve rim of the external ear
Antihelix - A landmark of the outer ear
Lobule - A landmark of the outer ear. The very bottom part of the outer ear
Crest of Helix - A landmark of the outer ear
ExternalAuditory Meatus - or External Auditory Canal. The auditory canal is the channel through which the sounds are led from the ear outside to the middle ear.
Eardrum - (tympanic membrane) A thin layer of skin at the end of the external ear canal
Auditory Ossicles - The three small bones in the middle ear, know as the hammer (malleus), anvil (incus) and stirrup (stapes) which are connected to one another. Together these ossicles are called the ossicular chain. Their purpose is to lead the sound striking the eardrum further into the inner ear
Oval Window - An opening in the bone between the air filled middle ear cavity and the fluid filled inner ear, and is covered by a thin membrane
Cochlea - Part of the inner ear that contains part of the hearing organs.
Semicircular Canals - Part of the organ of balance that is part of the inner ear
Eighth Nerve - Nerve that transmits messages from the inner ear to the brain.
Eustachian Tube - A tube connecting the middle ear cavity and the pharynx (back of the throat). It can be opened by coughing or swallowing, though it is normally closed. The occasional opening of the Eustachian tube is necessary to equalize the are in the middle ear cavity.

by mohweh Wed Mar 19, 2008 10:17 am

thanks for great effort dr_totti

by Dr Sarhan Wed Mar 19, 2008 10:40 am

Good ...

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