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Special Senses Voca

Iris the pigmented, involuntary muscle that acts as the diaphragm of the eye
Sclera the firm white fibrous outer layer of the eyeball; protects and maintains eyeball shape
Lacrimal Gland tear gland
Conjunctiva pink eye; an inflammation of the conjunctiva of the eye
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.
Lens the elastic, doubly convex structure in the eye that focuses the light entering the eye on the retina
Cornea the transparent anterior portion of the eyeball
Pupil an opening in the center of the iris through which light enters the eye
Aqueous Humor the watery fluid in the anterior chambers of the eye
Vitreous Humor the clear gelatinous substance that fills the eyeball between the retina and the lens; the eyeball jelly
Optic Disc a small oval-shaped area on the retina marking the site of entrance into the eyeball of the optic nerve
Retina light sensitive layer of the eye; contains rods and cones.
Choroid the pigmented nutritive layer of the eye
Suspensory Ligament fibrous ligament that holds the lens in place in the eye
Rod One of the two types of photosensitive cells in the retina
Cone one of the two types of photorecetor cells in the retina of the eye. Provides the color vision
Photoreceptor specialized receptor cells that respond to light eneregy
Fovea Centralis a small depression near the center of the retina, constituting the area of most acute vision
Refraction the bending of light
Magnification the process of enlarging the size of something, as an optical image.
Astigmatism a visual defect resulting from irregularity in the lens or cornea of the eye causing the image to be out of focus
Hyperopia farsightedness
Myopia nearsightedness
Pinna the outer projecting portion of the ear
Tympanic Membrane the eardrum
Eustation Tube the narrow channel connecting the middle ear and the nasopharynx.
Malleus the hammer-shaped bone that is the outermost of the three small bones in the mammalian middle ear
Incus an anvil-shaped bone between the malleus and the stapes in the mammalian middle ear
Stapes the innermost of the three small bones of the middle ear, shaped somewhat like a stirrup
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
Cochlea a cavity of the inner ear resembling a snail shell; houses the hearing receptor
Semicircular Canals certain canals of the inner ear
Vestibule a cavity, chamber, or channel that leads to or is an entrance to another cavity
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.
Equilibrium (as it pertains to balance) a state when opposite reactions or forces counteract each other exactly
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
Chemoreceptor receptors sensitive to various chemicals in solution
Olfactory receptor a specialized cell or group of nerve endings that responds to sensory stimuli
Olfactory Nerve either of the first pair of cranial nerves that conduct impulses from the mucous membranes of the nose to the olfactory bulb
Taste Bud receptors for taste on the tongue, roof of mouth, pharynx and larynx.
Created by: MeghanD



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