Ears Flashcards
Auricle (pinna)
external ear
external acoustic meatus
contains ceruminous glands and hairs to impede insects/objects
tympanic cavity
makes up the middle ear
auditory tube
connects tympanic cavity to oropharyax
labyrinths
bony and membranous (within the bony)
endolymph electolytes
High K+ low Na+ opposite of plasma
Perilymph
separates body and membranous labyrinth
Vestibular complex
made of semicircular ducts and utricle/saccule
semicircular canals
Anterior, posterior, lateral
begins in ampulla, hairs embedded in ampullary crest
Vestibulocochlear nerve
transmits information from vestibular complex and the cochlea
modiolus
spirals in ear cochlea
Cochlea layers
Scala vestibuli:contains perilymph
Scala tympani:perilymph
Cochlear duct:endolymph
Cochlear duct
between vestibule and tympani, this contains the organ of corti
window interfaces
Oval window on vestibuli
round window on tympani
how earring works
bone action on oval window causes fluid to move in vestibuli to tympani, that movement causes the endolymph in the cochlear duct to move over the hair cells
