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Ch 13.1 - The Ear
Anatomical Terms; do reverse first
20
Classics
Undergraduate 2
11/02/2009

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Term
pinna
Definition
auricle (little ear); projected part of the external ear
Term
external auditory meatus
Definition
external passage for sounds collected from the pinna to the tympanum
Term
cerumen
Definition
waxy subslance secreted b1'glands located throushout the external canal
Term
tympanic membrane
Definition
eardrum; drum-like structure that receivessound collectedin the externalauditory meatus(canal) and amplifies it through the middle ear
Term
malleus
Definition
hammer; first of the three auditory ossiclesof the middle ear
Term
incus
Definition
anvil; middle of the three auditory ossiclesof the middle ear
Term
stapes
Definition
stirrup; st of the three auditory ossiclesof the middle ear
Term
eustachian tube, auditory tube
Definition
tube connecting the middle ear to the pharynx (throat)
Term
mastoid process
Definition
projection of the temporal bone located behind the ear containing air cells that connect to the middle ear
Term
oval window
Definition
membrane that covers the opening between the middle ear and inner ear
Term
inner ear
Definition
structures and liquids that relay sound waves to the auditory nerve fibers on a path to the brain for interpretation of sound
Term
labyrinth
Definition
maze, inner ear consisting of bony and membranous labvrinths
Term
cochlea
Definition
coiled tubular structure of the inner ear that contains the organ of Corti
Term
perilymph
Definition
fluid that fills the bonv labvrinth of the ear
Term
endolymph
Definition
fluid within the cochlear duct of the inner ear
Term
organ of Corti
Definition
organ located in the cochlea that contains receptors (hair cells) that receive vibrations anc generate nerve impulses for hearing
Term
vestibule
Definition
middle part of the inner ear in front of the semicircular canals and behind the cochlea that contains the utricle and saccule
Term
utricle
Definition
larger of two sacs within the membranous labyrinth of the vestibule in the inner ear
Term
saccule
Definition
smaller of two sacs within the membranous labyrinth of the vestibule in the inner ear
Term
semicircular canals
Definition
three canals rvithin the inner ear that contain specialized receptor cells that generate nerve impulses with body movement
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