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Question	Answer
aqueous humor	watery fluid that fills the anterior chamber of the eye, in front of the lens
auricle	part of the ear attached to the side of the head
bony labyrinth	the fluid-filled complex maze of three spaces in the temporal bone
cataract	opacity of the lens of the eye
cerumen	ear wax
ceruminous gland	gland that produces a waxy substance called cerumen
chemoreceptor	receptors that respond to chemicals and are responsible for taste and smell
choroid	middle layer of the eyeball that contains a dark pigment to prevent the scattering of incoming light rays
cochlea	snail shell or structure of similar shape
conjunctiva	mucous membrance that lines the eyelids and covers the sclera
crista ampullaris	a specialized receptor located within the semicircular canals that detects head movements
endolymph	thick, clear fluid that fills the membranous labyrinth of the inner ear
eustachian tube	tube that connects the throat with the middle ear to equalize air pressure on both sides of the tympanum
external auditory canal	a curved tube extending from the auricle into the temporal bone, ending at the tympanic membrane
fovea centralis	small depression in the macula lutea where cones are most densely packed
glaucoma	disorder characterized by elevated pressure in the eye
gustatory cells	cells of taste
hyperopia	farsightedness
incus	middle ear bone that is shaped like an anvil
lacrimal gland	the glands that produce tears, located in the upper lateral portion of the orbit
lens	the refracting mechanism of the eye that is located directly behind the pupil
malleus	tiny middle ear bone that is shaped like a hammer
mechanoreceptor	receptors that are mechanical in nature
membranous labyrinth	a membranous sac that follows the shape of the bony labyrinth and is filled with endolymph
myopia	nearsightedness
optic disc	the area in the retina where the optic nerve fibers exit and there are no rods or cones; blind spot
organ of Corti	the organ of hearing located in the cochlea and filled with endolymph
ossicles	little bones found in the ears
papillae	small, nipple shaped elevations
perilymph	a watery fluid that fills the bony labyrinth of the ear
photopigments	chemicals in retinal cells that are sensitive to light
photoreceptor cell	specialized nerve cells stimulated by light
presbyopia	farsightedness of old age
proprioceptor	receptor located in the muscles, tendons and joints
pupil	the opening in the center of the iris that regulates the amount of light entering the eye
refraction	bending of a ray of light as it passes from a medium of one density to one of a different density
retina	innermost layer of the eyeball
sclera	white outer coat of the eyeball
semicircular canals	part of the inner ear that contains a specialized receptor called crista ampullaris that generates a nerve impulse on movement of the head
stapes	tiny stirrup shaped bone in the middle ear
tympanic membrane	eardrum
vestibular nervea	division of the vestibulocochlear nerve
vestibule	located in the inner ear and is the portion adjacent to the oval window between the semicircular canals and the cochlea
vitreous humor	the jellylike fluid found in the eye that is posterior to the lens