TEPspecialsenses
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| iris | the pigmented, involuntary muscle that acts as the diaphragm of the eye.
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| sclera | the firm white fibrous outer layer of the eyeball; protects and maintains eyeball shaper
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| lacrimal gland | the gland that creates tears
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| conjunctiva | the thin, protective mucous membrane lining the eyelids and covering the anterior surface of the eyeball
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| optic nerve | nerve connected to the eye; composed of ganglion cell axons
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| lens | the elastic, doubly convex structure in the eye that focuses the light entering the eye on the retina
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| cornea | the transparent anterior portion of the eyeball
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| pupil | an opening in the center of the iris through which light enters the eye
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| aqueous humor | the watery fluid in the anterior chambers of the eye
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| vitreous humor | liquid that helps the eyeball from collapsing inward y reinforcing it internally
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| optic disc | the place in the retina where the optic nerve leaves the eyeball
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| retina | light sensitive layer of the eye; contains rods and cones
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| choroid | the pigmented nutritive layer of the eye
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| suspensory ligament | fibrous ligament that holds the lens in place in the eye
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| rod | one of two types of photosensitive cells in the retina
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| cone | one of the two types of photoreceptor cells in the retina of the eye. provides for color vision
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| photoreceptor | specialized receptor cells that respond to light energy
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| fovea centralis | central pit
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| refraction | a bend in light
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| magnification | the process of making something appear larger, as by use of lenses.
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| astigmatism | a visual defect resulting from irregularity in the lens or cornea of the eye causing the image to be out of focus
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| hyperopia | farsightedness
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| myopia | nearsightedness
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| pinna | the shell-shaped stucture surrounding the auditory canal opening
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| tympanic membrane | the eardrum
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| eustation tube | runs obliquely downward to link the middle ear cavity with the throat
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| malleous | bone in the ear which moves when the eardrum moves and transfers the vibrations to the anvil.
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| incus | passes vibration to the stapes.
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| stapes | presses on the oval window of the inner ear.
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| oval window (round window) | openings in a bon wall by the tempanic cavity
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| cochlea | a cavity of the inner ear resembling a snail shell; housing the hearing receptor
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| semicircular canals | canals inside the ear, resembling a semicircle, towards the top
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| vestibule | situated between the semicircular canals and the cochlea
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| auditory nerve | the nerve that comes from the ear
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| equilibrium (as it pertains to balance) | a state when opposite reactions or forces counteract each other exactly
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| tinnitus | hearing ringing, buzzing, or other sounds without an external cause
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| chemoreceptor | receptors sensitive to various chemicals in a soution
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| olfactory receptor | receptors or the sense of smell
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| olfactory nerve | travels from the nose to the brain
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| taste bud | receptors used for taste on the tongue, roof of mouth, pharynx and laynx.
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