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66 terms

The Ear

Medical terms of the special senses (ear)
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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