The Ear

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66 terms · Medical terms of the special senses (ear)

contains cilia that helps direct sound waves and ceruminous glands that produce cerumen to protect and lubricate the ear

external auditory canal (auditory meatus)

cerumen

earwax

transmits sound waves to the middle ear

eardrum or tympanic membrane

found in the middle ear

the ossicles (malleous, incus and stapes)

connects the middle ear to the pharynx and equalizes pressureon both sides of the tympanic membrane.

eustachian tube

separates the middle ear from the inner ear

oval window

the egg shaped central part of the inner ear; located next to the stapes; important for maintaining static equilibrium.

vestibule

continuous with the vestibule; filled with fluid needed for balance and dynamic equilibrium.

semicircular canals

snail-shaped structures; contains auditory fluids

cochlea

converts sound wave vibrations into nerve impulses and is a spiral organ that rests on the basilar membrane.

organ of corti (it is the organ of hearing) (pic: top left)

carries nerve impulses to the brain

vestibularcochlear nerve (Cranial Nerve VIII) (pic: top right)

functions as a pressure valve in the ear

round window

the channel between the scala vestibuli and and scala tympani.

the scala media (cochlear duct)

the channel above the bony partition and ends at the oval window is the.

scala vestibuli

the channel below the bony labyrinth and ends at the round window.

scala tympani

sacs within the membranous labyrinth

utricle and saccule

the inner ear

labyrinth (because it's complicated series of canals)

canals that are located in the labyrinth

the bony labyrinth and the membranous labyrinth

where perilymph is found

the bony labyrinth

where endolymph is found

the membranous labyrinth

three half circles within the inner ear

semicircular canals

function of the semicircular canals

dynamic equilibrium

receptor cells

hair cells

gelatinous membrane that has receptor cells in it

the tectorial membrane

large swelling at one end of the membranous labyrinth

the ampulla (pic: top right)

small elevations within the ampullae

cristae

a gelatinous mass that a group of hair cells are covered by

cupula

membrane that separates the scala media from the scala tympani.

basilar membrane

membrane that separates the scala media from the scala vestibuli

vestibular membrane

cranial nerve that has receptors for both hearing and equilibrium.

cranial nerve VIII/vesitbularcochlear nerve

what the outer ear consists of

pinna/auricle, external auditory canal/auditory meatus, tympanic membrane/eardrum

filters foreign substances from entering the ear

hair and ceruminous glands/wax

where the middle ear extends

eardrum to oval/round windows

ossicles in the middle ear

malleous, incus, stapes

stapes connects here

oval window

equalizes pressure on both sides of the tympanic membran

eustachian tube/pharyngotympanic tube

semi-transparent membrane in the outer ear

tympanic membrane/eardrum

another name for the inner ear

labyrinth

name the two canals within the labyrinth

bony and membranous labyrinth

fluid within the bony labyrinth

perilymph

receives vibrations of sound waves

tympanic membrane

series of sacs and tubes found within the bony labyrinth

membranous labyrinth

ossicle that is attached to the tympanic membrane

malleous

regions the ear is divided into

external, middle and inner ear

divisions of the bony labyrinth

vestibule, semi-circular canals, the cochlea

two sacs within the vestibule

utricle and saccule

fluid within the membranous labyrinth

endolymph

type of equilibrium that vestibule is responsible for

static

egg shaped portion of the bony labyrinth

vestibule

thickened wall of the utricle and saccule

macula

where the scala vestibuli ends

oval window

another name for scala media

cochlear duct

function of the round window

pressure valve

fluid within the scala media

endolymph

membranes in the cochlea that separate the scalas

basilar and vestibular

rests on the basilar membrane

organ of corti (the entire pic)

channel between scala tympani and scala vestibuli

scala media/cochlear duct

where the scala tympani ends

round window

small elevations in the ampulla

cristae

snail-like shell attached to the saccule

cochlea

swelling at one end of the membranous labyrinth

ampulla

stimulates the receptors that are in the macula

otoliths

function of the semi-circular canals

dynamic equilibrium

mass that covers a group of receptors on cristae

cupula

function of the organ of corti

hearing

membrane that goes over the receptors in the organ of corti

tectoral

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