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Special Senses Voca
| Question | Answer |
|---|---|
| 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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