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The Ear -Q – Anatomic Terms & A – Meaning

external ear outer structures of the ear that collect sound
pinna auricle (little ear); projected part of the external ear (pinna = feather)
external auditory meatus or canal external passage for sounds collected from the pinna to the tympanum
cerumen a waxy substance secreted by glands located throughout the external canal
middle ear structures in the middle of the ear that vibrate sound from the tympanic membrane to the inner ear
tympanic membrane (TM) (see Fig. 11-3, B) eardrum; drum-like structure that receives sound collected in the external auditory canal and amplifies it through the middle ear
malleus hammer; first of the three auditory ossicles of the middle ear
incus anvil; middle of the three auditory ossicles of the middle ear
stapes stirrup; last of the three auditory ossicles of the middle ear
eustachian tube tube connecting the middle ear to the pharynx (throat)
oval window membrane that covers the opening between the middle ear and inner ear
inner ear intricate, fluid-filled, intercommunicating bony and membranous passages that function in hearing by relaying sound waves to auditory nerve fibers on a path to the brain for interpretation; also sense body movement and position to maintain balance and equ
cochlea coiled tubular structure of the inner ear that contains the organ of Corti (cochlea = snail)
perilymph fluid that fills the bony labyrinth of the inner ear
endolymph fluid within the membranous labyrinth of the inner ear
organ of Corti structure located in the cochlea; contains receptors (hair cells) that receive vibrations and generate nerve impulses for hearing
vestibule middle part of the inner ear, in front of the semicircular canals and behind the cochlea, that contains the utricle and the saccule; functions to provide body balance and equilibrium
utricle the larger of two sacs within the membranous labyrinth of the vestibule in the inner ear (uter = leather bag)
saccule the smaller of two sacs within the membranous labyrinth of the vestibule in the inner ear (sacculus = small bag)
semicircular canals three canals within the inner ear that contain specialized receptor cells that generate nerve impulses with body movement
Created by: MT student1