Special Senses Voca
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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 shape
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| Lacrimal Gland | tear gland
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| Conjunctiva | pink eye; an inflammation of the conjunctiva of the eye
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| Optic nerve | either of the second pair of cranial nerves that arise from the retina and carry visual information to the thalamus and other parts of the brain.
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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 | the clear gelatinous substance that fills the eyeball between the retina and the lens; the eyeball jelly
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| Optic Disc | a small oval-shaped area on the retina marking the site of entrance into the eyeball of the optic nerve
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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 the two types of photosensitive cells in the retina
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| Cone | one of the two types of photorecetor cells in the retina of the eye. Provides the color vision
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| Photoreceptor | specialized receptor cells that respond to light eneregy
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| Fovea Centralis | a small depression near the center of the retina, constituting the area of most acute vision
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| Refraction | the bending of light
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| Magnification | the process of enlarging the size of something, as an optical image.
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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 outer projecting portion of the ear
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| Tympanic Membrane | the eardrum
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| Eustation Tube | the narrow channel connecting the middle ear and the nasopharynx.
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| Malleus | the hammer-shaped bone that is the outermost of the three small bones in the mammalian middle ear
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| Incus | an anvil-shaped bone between the malleus and the stapes in the mammalian middle ear
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| Stapes | the innermost of the three small bones of the middle ear, shaped somewhat like a stirrup
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| Oval window (round window) | the oval opening in the middle ear to which the base of the stapes is connected and through which the ossicles of the ear transmit sound vibrations to the cochlea
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| Cochlea | a cavity of the inner ear resembling a snail shell; houses the hearing receptor
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| Semicircular Canals | certain canals of the inner ear
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| Vestibule | a cavity, chamber, or channel that leads to or is an entrance to another cavity
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| Auditory Nerve | either of the eighth pair of cranial nerves that carries sensory impulses from the ear to the brain. The auditory nerve transmits information related to sound and balance.
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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 | a sound in one ear or both ears, such as buzzing, ringing, or whistling, occurring without an external stimulus and usually caused by a specific condition
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| Chemoreceptor | receptors sensitive to various chemicals in solution
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| Olfactory receptor | a specialized cell or group of nerve endings that responds to sensory stimuli
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| Olfactory Nerve | either of the first pair of cranial nerves that conduct impulses from the mucous membranes of the nose to the olfactory bulb
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| Taste Bud | receptors for taste on the tongue, roof of mouth, pharynx and larynx.
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Created by:
MeghanD
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