| A | B |
|---|
| ossicles | the smallest bones in the body |
| incus | anvil |
| stapes | stirrup |
| malleus | hammer |
| tympanic membrane | vibrates as sound waves hit it; transmits the vibrations to the ossicles, also called the ear drum |
| auditory tube | connects the nasopharynx and the middle ear, also called the eustachian tube |
| myopia | nearsightedness, distant objects appear blurry |
| hyperopia | farsightedness, inability to focus on close objects |
| emmetropia | normal vision |
| cataract | clouding of the lens, resulting in loss of sight |
| night blindness | inability to see well in the dark |
| Vitamin A | vitamin involved in the ability to see in the dark |
| aqueous humor | fluid that provides nutrients to the lens and cornea |
| tapetum lucidum | iridescent part of the choroid in the cow, not in humans |
| optic disc | area of the retina that lacks photoreceptors |
| sclera | the "white" of the eye, the tough outer covering |
| vitreous humor | the jelly like liquid between the lens and retina |
| ciliary body | contains muscle that controls the shape of the lens |
| pupil | opening through which light passes |
| iris | pigmented tunic surrounding the pupil |
| retina | contains photoreceptors for vision |
| lens | this structure changes shape to focus light on the retina |
| cones | responsible for color vision |
| fovea centralis | the area of the retina that contains only cone cells |
| photoreceptors | rods and cones |
| rods | responsible for vision in dim light |
| cornea | the only tissue that can be transplanted without worry of rejection |
| astigmatism | when the cornea is abnormally curved |
| vestibulocochlear | the cranial nerve responsible for hearing and balance |
| equilibrium | the semicircular canals, vestibules, and maculae are all involved in maintaining ____________ |
| accommodation | ability to focus for close vision |
| glaucoma | condition of increasing pressure inside the eye, resulting from blocked drainage of aqueous humor |
