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VocofJustenSpecsense
Vocbulary of the special senses
| 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 | the tear producing gland |
| conjunctiva | the thin, protective mucous membrane lining in the eyelids and covering the anterior surface of the eyeball |
| optic nerve | either of the second pair of cranial nerves, which carry sensory information relating to vision from the retina of the eye to 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 cornea juice |
| vitreous humor | the clear gelatinous substance that fills the eyeball between the retina and the lens. |
| optic disc | a small oval-shaped area on the retina marking the site of entrance into the eyeball of the optic nerve or the blind spot |
| 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 photoreceptor cells in the retina of the eye. Provides for color vision. |
| photoreceptor | specialized receptors cells that respond to light nergy |
| fovea centralis | a small depression near the center of the retina, constituting the area of most acute vision |
| refraction | the ability of the eye to bend light so that an image is focused on the retina |
| magnification | the process of enlarging the size of something |
| astigmatisma | visual defect resulting from irregularity in the lens or cornea of the eye causing the image to be out of focus |
| hyperopia | farsightedness |
| myopia | near sightedness |
| pinna | outer projecting portion of the ear |
| tympanic membrane | the eardrum |
| eustation tube | the tube that links the pharynx to the middle ear |
| malleous | a small bone in the ear used to pick up vibrations from the eardrum and then transfers it to the anvil |
| incus | passes the vibration from the malleous to the stapes. |
| stapes | the vibration comes here from the incus and makes this press against the oval window |
| oval window (round window) | when pressed against by the stapes it gets the fluid in the inner ear into motion eventually activating the hearing receptors |
| cochlea | houses the hearing receptors 1 of the 3 subdivisions of the bony labyrinth |
| semicircular canals | 1 of the 3 subdivisions of the bony labyrinth that help with balance |
| vestibule | the cavity between the cochlea and the semicircular canals |
| auditory nerve | either of the eighth pair of cranial nerves that divides to form the cochlear nerve and that vestibular nerve |
| equilibrium (as it pertains to balance) | a state where oppisite reactions or forces counteract each other |
| tinnitus | A buzzing, ringing, or whistling sound in one or both ears occurring without an external stimulus. Its causes include ear infection or blockage, certain drugs, head injury, and neurologic disease. |
| chemoreceptor | the receptors for taste and olfaction |
| olfactory receptor | receptors for the sense of smell |
| olfactory nerve | the nerve that transmits impulse about smell to the cortex of the brain |
| taste bud | receptor cells for the sense of taste |
Created by:
Justen Rhyne
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