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Salping/o
eustachian tube (uterine tube)
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-acusis
hearing condition
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External Ear
(3 Parts)
- - pinna
- - external auditory meatus (canal)
- - cerumen
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Pinna
- external ear
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auricle (little ear) - - projected part of the external ear
- - (pinna= feather)
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External Auditory Meatus (Canal)
- external ear
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external passage for sounds to collect from the pinna to the tympanus - - (meat/o= opening)
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Cerumen
- external ear
- - waxy substance
secreted by glands located throughout the external canal
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Middle Ear
(4 Parts)
- - tympanic membrane (TM)
- - malleus
- - incus
- - stapes
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Tympanic Membrane (TM)
- middle ear
- - eardrum
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drum-like structure that receives sound collected in the external auditory meatus (canal) & amplifies it through the middle ear
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Malleus
- middle ear
- - hammer
- - first
of the three auditory ossicles of the middle ear
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Incus
- middle ear
- - anvil
- - middle
of the three auditory ossicles of the middle ear
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Stapes
- middle ear
- - stirrup
- - last
of the three auditory ossicles of the middle ear
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Eustaichian Tube
(Auditory Tube)
tube connecting the middle ear to the pharynx (throat)
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Mastoid Process
projection of the temporal bone located behind the ear containing air cells that connect to the middle ear
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Oval Window
membrane that covers the opening between the middle ear & the inner ear
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Inner Ear
(9 Parts)
- structures & liquids that relay sound waves to the auditory nerve fibers on a path to the brain for interpretation of sound
- - 9 parts: labyrinth, cochlea, perilymph, endolymph, organ of Corti, vestibule, utricle, saccule, semicircular canals
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Labyrinth
- inner ear
- - maze
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inner ear consisting of bony & membranous labyrinths
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Cochlea
- inner ear
- - coiled tubular
structure of the inner ear that contains the organ of Corti- (cochlea= snail)
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Perilymph
- inner ear
- - fluid
that fill the bony labyrinth of the ear
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Endolymph
- inner ear
- - fluid
within the cochlear duct of the inner ear (labyrinth)
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Organ of Corti
- inner ear
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organ located in the cochlea that contains receptors (hair cells) that receive vibrations & generate nerve impulses for hearing
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Vestibule
- inner ear
- - middle
part of the inner ear in front of the semicircular canals & behind the cochlea that contains the utricle & saccule
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Utricle
- inner ear
- - larger
of two sacs within the membranous labyrinth of the vestibule in the inner ear - - (uter= leather bag)
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Saccule
- inner ear
- - smaller
of two sacs within the membranous labyrinth of the vestibule in the inner ear - - (sacculus= small bag)
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Semicircular Canals
- inner ear
- - three canals
within the inner ear that contain specialized receptor cells that generate nerve impulses with body movement
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