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23 Cards in this Set
- Front
- Back
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structure composing the external ear |
pinna (auricle), external auditory canal, tympanic membrane |
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structures composing the internal ear |
cochlea, semicircular canals, vestibule |
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collectively called the ossicles |
incus (anvil), malleus (hammer), stapes (stirrup) |
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involved in equalizing the pressure in the middle ear with atmospheric pressure |
pharyngotympanic (auditory) tube |
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vibrates at the same frequency as sound waves hitting it; transmits the vibrations to the ossicles |
tympanic membrane |
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contain receptors for the sense of balance |
vestibule, semicircular canals |
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transmits the vibratory motion of the stirrup to the fluid in the scala vestibuli of the inner ear |
oval window |
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acts as a pressure relief valve for the increased fluid pressure in the scala tympani; bulges into the tympanic cavity |
round window |
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passage between the throat and the tympanic cavity |
pharyngotympanic (auditory) tube |
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fluid contained within the membranous labryinth and bathing the membranous labryinth |
endolymph |
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fluid contained within the osseous labryinth and bathing the membranous labryinth |
perilymph |
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sacs found within the vestibule |
utricle, saccule |
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contains the spiral organ (of Corti) |
cochlear duct |
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sites of the maculae |
utricle, saccule |
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positioned in all spatial planes |
semicircular ducts |
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hair cells of spiral organ (of Corti) rest on this membrane |
basilar membrane |
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gelatinous membrane overlying the hair cells of the spiral organ (of Corti) |
tectorial membrane |
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contains the crista ampullaris |
ampulla |
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function in static equilibrium |
saccule, vestibular nerve, otoliths |
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function in dynamic equilibrium |
ampulla, utricle, capula, vestibular nerve |
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carries auditory information to the brain |
cochlear nerve |
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gelatinous cap overlying hair cells of the crista ampullaris |
capula |
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grains of calcium carbonate in the maculae |
otoliths |
