Ear Functions

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10 Terms

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Auricle (pinna)

Directs sound waves toward external auditory canal

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External Auditory Canal

Component of external ear; located within the temporal bone; is a passageway for sound waves

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Tympanic Membrane

Vibrates in response to sound waves entering the external auditory canal

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Auditory Ossicles

Vibrates in response to vibrating tympanic membrane

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Oval Window

Vibrates in response to the vibrating stapes, causing the fluid of the inner ear to move

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Pharyngotympanic Tube

Connects middle ear to the nasopharynx, allowing for equalization of pressure on either side of the tympanic membrane

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Cochlea

Snail shaped structure that contains the receptor organ for hearing - the spiral organ

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Vestibule

Middle part of the inner ear, subdivided into utricle and saccule, which contain macula (receptor organ for static equilibrium)

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Semicircular Cells

Function in dynamic equilibrium

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Vestibulocochlear Nerve

Vestibular nerve and cochlear nerve join to form CN VIII