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Anatomy
Special Senses
| Question | Answer |
|---|---|
| Secures the lens to the ciliary body | Suspensory ligaments |
| Fluid that fills the anterior segment of the eye; provides nutrients to the lends and cornea | Aqueous humor |
| Fibrous tunic; white and opaque | Sclera |
| Area of retina that lacks photoreceptors | Optic disk(blind spot) |
| Muscular structure that manipulates the lens | Ciliary body |
| Nutritive tunic of the eye | choroid coat |
| drains the aqueous humor of the eye | canal of schlemm |
| tunic concerned with image formation | retina |
| gel-like substance, filling the posterior segment of the eyeball; helps reinforce the eyeball | vitreous humor |
| heavily pigmented tunic that prevents light scattering within the eye | choroid coat |
| smooth muscle structures | iris, ciliary body |
| area of acute or discriminatory vision | fovea centralis |
| refratory media of eye | cornea, aqueous humor, vitreous humor, lens |
| anteriormost clear part of the fibrous tunic | cornea |
| pigmented "diaphragm" of the eye | iris |
| Why should you rest your eyes after a while? | Because it's hard to focus for a long time and your muscles get tired |
| the closes point at which clear vision is possible | near point of vision |
| the electromagnetic waves to which the photoreceptors of the eyes respond | visible light |
| the point at which light rays are converged by a convex lens | focal point |
| a lens that is thickest at the edges; diverges the light rays | concave lens |
| the point beyond which accommodation is necessary | far point of vision |
| light bending | refraction |
| ability to focus for close vision | accommodation |
| normal vision | emmetropia |
| inability to focus well on close objects; farsightedness | hyperopia |
| reflex constriction of pupils when they are exposed to bright light | photopupillary reflex |
| clouding of the lens, resulting in loss of sight | cataract |
| nearsightedness | myopia |
| blurred vision, resulting from unequal curvatures of the lens or cornea | astigmatism |
| condition of increasing pressure inside of the eye, resulting from blocked drainage of aqueous humor | glaucoma |
| reflex constriction of the pupils when viewing close objects | accommodation pupillary reflex |
| inablility to see well in the dark | night blindness |
| What does binocular vision do? | gives you depth perception |
| structures composing the outer ear | pinna, external auditory meatus, tympanic membrane |
| elements of the bony or osseous labyrinth | cochlea, semicircular canals, vestibules |
| the ossicles | malleus, stapes, incus |
| ear structures not involved with hearing | vestibule,semicircular canals |
| allows middle ear pressure to be equalized with atmospheric pressure | pharyngotympanic tube |
| transmits sound vibrations to the ossicles | tympanic membrane |
| contains the organ of Corti | cochlea |
| passage from the nasopharynx to the middle ear; also called the pharyngotympanic tube | auditory tube |
| house receptors for the sense of equilibrium | vestibule, semicircular canals |
| transfers vibrations from the stirrup to the fluid in the inner ear | oval window |
| fluid inside the membranous labyrinth | endolymph |
| fluid within the osseous labyrinth, and surrounding the membranous labyrinth | perilymph |
| fits into the oval window | stirrup |
Created by:
buscehan