15.4 Flashcards
what does the external ear consist of
auricle/pinna, and the external acoustic meatus/auditory canal
what lines the auditor canal?
skin bearing hairs, sebaceous, and ceremonious glands
what does the tympanic membrane serve as and function as
the boundary between the outer and middle ear
and functions to transfer sound energy to the auditory ossicles
what does the middle ear consist of
auditory ossicles (m.i.s), auditory tube, epitympanic recess
what does the inner ear consist of
the bony labyrinth - a network of channels and cavities in the temporal bone
membranous labyrinth - membranous sacs and ducts within the bony labyrinth
what fills the bony labyrinth and the membranous
perilymph
endolymph
what is the vestibule
the central cavity of the bony labyrinth containing the saccule an the utricle that house maculae, the equilibrium receptor regions
what is the function of the vestibule
monitor position of the head in space and respond to linear acceleration
what are semicircular canals
the canals that project from the posterior aspect of the vestibule
each of which contains a nodular swelling called the ampulla that contains an equilibrium receptor, crista ampullaris
what is the function of crista ampullaris
detects angular or rotational acceleration
what does the cochlea contain
cochlear duct that holds the organs of corti
what is the organ of corti
the receptor organ for hearing
what are the 3 cavities within the cochlea
scala vestibuli
scala media
scala tympani
