auditory tube
equalizes air pressure between the tympanic cavity and the outside air pressure
cochlea
contains spiral organ of Corti and three fluid-filled chambers: scala vestibuli, scala tympani, and cochlear duct
external auditory canal
sound wave travels through this tunnel to cause the eardrum to vibrate
malleus, incus, stapes
small bones of middle ear that conduct sound wave to inner ear
oval window
opening into the inner ear; stapes articulates with it
pinna
acts like a funnel to direct sound waves into the ear
round window
dissipates sound wave after it travels through the cochlea
semicircular canals
contains crista ampullaris and cupula for detection of rotational movement
spiral organ of Corti
contains hair cells for hearing
tympanic cavity
air-filled cavity that houses the auditory ossicles
tympanic membrane
vibrates in response to sound waves; aka the eardrum
vestibule
contains the saccule and utricle for detection of head position and when the body is still
vestibulocochlear nerve
conducts auditory equilibrium to the brain
sclera
white portion of the fibrous layer of eye
cornea
clear portion of the fibrous outer layer of the eye
conjuctiva
thin membrane that covers the anterior portion of the eye
lens
focuses light onto the retina
choroid
contains blood vessels to provide nourishment to the retina
ciliary body
muscle that pulls on the lens to bend light for near vision
iris
muscle that constricts or relaxes to regulate the amount of light that enters the eye
pupil
hole" that allows light to enter posterior chamber of eye
retina
contains photoreceptors
optic nerve
carry visual information to the brain
optic disc
place where axons of ganglion cells penetrate through wall of eye
aqueous humor
fluid that fills the anterior chamber of the eye
vitreous humor
gel-like substance that fills the posterior chamber of the eye
lacrimal gland
produces tears