EML Chapter 13 Anatomy
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11 Terms
ear
organ of hearing & balance, includes the external ear, middle ear, & labyrinth or inner ear
external ear
consists of the auricle & external auditory canal
external auditory canal
short tube that ends at the tympanic membrane
middle ear
consists of tympanic membrane & the tympanic cavity containing ossicles
tympanic membrane
semitransparent membrane that separates the external auditory canal & the middle ear cavity, transmits sound vibrations to the ossicles ( eardrum)
ossicles
bones of the middle ear that carry sound vibrations
eustachian tube
passage between the middle ear & the pharynx, equalizes air pressure on both sides of the tympanic membrane
labyrinth
bony spaces within the temporal bone of the skull made up of 3 distinct parts, the cochlea, semicircular canals, & vestibule
cochlea
coiled portion of the inner ear containing the sensory organ for hearing
mastoid bone
portion of the temporal bone of the skull posterior & inferior to each auditory canal
semicircular canals & vestibule
sensory organs of balance containing receptors & endolymph