Sense Organs: eye and ear
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| Dark opening of the eye, surrounded by the iris, through which light rays pass | pupil
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| Behind the cornea and in front of the lens and iris. It contains aqueous humor. | anterior chamber
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| Fluid produced by the ciliary body and found in the anterior chamber | aqueous humor
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| Structure on each side of the lens that connects the chorois and iris. | Ciliary body
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| Fibrous transparent layer of clear tisue that extends over the anterios portion of the eyeball | cornea
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| Tiny pit or depression in the retina that is the region of clearest vision | fovea centralis
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| Colored pigmented membrane surrounding the pupil of the eye | iris
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| Transparent, biconvex body behind the pupil of the eye | lens
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| Point at which optic nerve fibers cross in the brain | optic chiasm
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| Region at the back of the eye where the optic nerve meets the retina. Also called the blind spot. | Optic disc
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| Cranial nerve carrying impulses from the retina to the brain | optic nerve
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| Light-sensitive nerve cell layer of the eye containing photoreceptor cells | retina
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| Soft,jelly-like material behind the lens in the vitreous chamber. | vitreous humor
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| Tough, white outer coat of the eyeball | sclera
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| Responsible for color and central vision | cones
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| Essential for vision in dim light and peripheral vision | rods
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| aque/o | water
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| blephar/o | eyelid
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| conjunctiv/o | conjunctiva
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| cor/o | pupil
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| corne/o | cornea
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| cycl/o | ciliary body
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| dacry/o | tears, tear duct
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| ir/o, irid/o | iris
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| kerat/o | cornea
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| lacrim/o | tears
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| ocul/o | eye
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| ophthalm/o | eye
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| opt/o, optic/o | eye, vision
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| palpebr/o | eyelid
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| papill/o | optic disc
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| phac/o, phak/o | lens of the eye
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| pupill/o | pupil
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| retin/o | retina
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| scler/o | sclera
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| uve/o | uvea
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| vitre/o | glassy
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| ambly/o | dull, dim
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| dipl/o | double
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| glauc/o | gray
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| mi/o | smaller, less
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| mydr/o | widen, enlarge
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| nyct/o | night
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| phot/o | light
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| presby/o | old age
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| scot/o | darkness
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| xer/o | dry
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| -opia | vision
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| -opsia | vision
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| -tropia | to turn
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| Defective curvature of the cornea or lens of the eye | astigmatism
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| Farsightedness | hyperopia
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| Nearsightedness | myopia
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| Impairment of vision as a result of old age | presbyopia
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| Clouding of the lens, causing decreased vision | cataract
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| Retinal effects of diabetes mellitus include microaneurysms, hemorrhages, dilation of retinal veins, and neovacularization | diabetic retinopathy
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| Increased intraocular pressure results in damage to the retina and optic nerve with loss of vision | glaucoma
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| Localized, purulent, inflammatory staphylococcal infection of a sebaceous gland in the eyelid | hordeolum (stye or sty)
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| Visual examination of the interior of the eye | ophthalmoscopy
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| Clarity of vision is asessed | visual acuity test
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| Measures the area within which objects are seen when the eyes are fixed, looking straight ahead without movement of the head | visual field test
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| LASIK | laser in situ keratomileusis
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| OD | right eye
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| OS | left eye
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| PERRLA | pupils equal, round, reactive to light and accommodation
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| VA | visual acuity
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| VF | visual filed
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| Channel that leads from the pinna to the eardrum | auditory canal
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| Carry impulses from the inner ear to the brain | auditory nerve fibers
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| Channel between the middle ear and the nasopharynx | auditory tube, eustachian tube
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| Flap of the ear, the protruding par of the external ear; pinna | auricle
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| Waxy substance secreted by the external ear; ear wax | cerumen
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| Snail-shaped, spirally wound tube in the inner ear | cochlea
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| Fluid within the labrynth of the inner ear | endolymph
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| Second ossicle of the middle ear; anvil | incus
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| First ossicle of the middle ear; hammer | malleus
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| Sensitive auditory receptor area found in the cochlea of the inner ear | organ of corti
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| Small bone of the ear | ossicle
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| Membrane between the middle ear and the inner ear | oval window
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| Auricle; flap of the ear | pinna
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| Passages in the inner ear associated with maintaining equilibrium | semicircular canals
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| Third ossicle of the middle ear; stirrup | stapes
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| Membrane between the outer and the middle ear; eardrum | tympanic membrane
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| Central cavity of the labrynth, connecting the semicircular canals and the cochlea | vestibule
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| acous/o | hearing
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| audi/o | hearing
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| audit/o | hearing
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| aur/o, auricul/o | ear
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| cochle/o | cochlea
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| mastoid/o | mastoid process
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| myring/o | eardrum
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| ossicul/o | ossicle
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| ot/o | ear
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| salping/o | eustachian tube
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| staped/o | stapes
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| tympan/o | eardrum; tympanic membrane
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| vestibul/o | vestibule
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| -acusis, -cusis | hearing
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| -meter | instrument to measure
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| -otia | ear condition
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| Disorder of the labyrinth of the inner ear | Meniere disease
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| Inflammation of the middle ear | otitis media
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| Sensation of noises in the ears | tinnitus
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| Sensation of irregular or whirling motion either of oneself or of external objects | vertigo
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| Testing the sense of hearing | audiometry
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| Visual examination of the ear with an otoscope | otoscopy
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| Test of ear conduction using a vibration source (tuning fork) | tuning fork test
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| AD | right ear
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| AS | left ear
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| EENT | eyes, ears, nose and throat
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| ENT | ears, nose and throat
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