auricle, external auditory canal, tympanic membrane
the three parts of the external ear
auditory ossicles, auditory tubes
structures of the middle ear
malleus, incus, stapes
the auditory ossicles are made of these three structures
labyrinth, oval window, round window
the parts of the internal ear
outer, funnel-shaped structure
external auditory meatus
s-shaped canal about 2.5 in long
collect sound waves
the function of the auricle
the eardrum; skin covered membrane
transmit vibrations, amplify sound
the functions of the auditory ossicles
attached to the eardrum; vibrates when the eardrum does
passes vibrations from the malleus to the stapes
acts like a piston in the oval window transmitting vibrations to fluid in the inner ear
what does the fluid stimulate?
this connects the middle ear to the nasopharynx to help maintain equal air pressure on both sides of the eardrum
what sound do the ear drums make that equalizes the pressure on both sides of the eardrum?
region where ear infections occur
oping of inner ear into middle ear
covered by the second tympanic membrane
tensor tympani muscle, stapedius muscle
attached to the ossicles, help dampen large vibrations of stapes, protect oval window
the inner ear is made up of a complex system of communicating chambers called ___________.
found between the two kinds of labyrinth
the two types of labyrinth
an extracellular fluid located within the cochlea
the major cation of perilymph
the perilymph and endolymph function in regulating what?
this is located inside the membranous labyrinth
these structures provide a sense of equilibrium
contains a bony core and thin bony shelves
is a chamber in the bony labyrinth above the cochlear duct, opens to the oval window
is a chamber below the cochlear duct, opens to the round window
what are both the scala vestibuli and scala tympani filled with?
this separates the cochlear duct from the scala vestibuli
separates the cochlear duct from the scala tympani
is a chamber in the membranous laybrinth which contains hearing receptors
what is the cochlear duct filled with?
organ of hearing, rests on the basilar membrane inside of the cochlear duct
hair cells which contract the tectorial membrane
external auditory meatus
the auricle directs sound waves into this
sound waves strike this, causing it to vibrate
distance the eardrum moves depends on these two factors
the auditory ossicles amplify and transmit the vibrations to this
fulid pressure waves
movement of stapes at the oval window sets up ________ _______ ________ in the perilymph of cochlea
scala vestibuli, scala tympani
pressure waves are transmitted from the _____________ to the ______________
the auditory cortex is found where?
the range of sound frequencies normal hearing can detect
the two types of equilibrium
type of equilibrium that helps maintain the position of the head when the head and body are still
type of equilibrium that helps maintain balance when the head and body suddenly move and rotate
a tiny structure consisting of hair cells and supporting cells that lies inside the utricle and saccule
grains of calcium carbonate
which part of the vestibulocochlear nerve is involved in equilibrium?
the organs of dynamic equilibrium
hair cells of dynamic equilibrium extend into a dome shaped gelatinous structure called ___________
these are associated with joints to maintain equilibrium