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involved in equalizing the pressure in the middle ear with atmospheric pressure
pharyngotympanic (auditory) tube
vibrates at the same frequency as sound waves hitting it; transmits the vibrations to the ossicles
transmits the vibratory motion of the stirrup to the fluid in the scala vestibuli of the inner ear
acts as a pressure relief valve for the increased fluid pressure in the scala tympani; bulges into the tympanic cavity
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