| A | B |
|---|
| iris | the colored part of the eye |
| iris | smooth muscle that controls the amount of light entering the eye |
| lens | disc that focuses light entering the eye |
| rod | photoreceptor important in night vision |
| cone | photoreceptor important for color vision |
| retina | the part of the eye that contains rods and cones |
| pupil | the hole through which light enters the eye |
| fovea | the center of the retina |
| sclera | the white part of the eye |
| vitreous humor | fluid filling the interior of the eye |
| aqueous humor | fluid filling the space between the cornea and the lens |
| cornea | transparent outer layer of the eye covering the pupil and iris |
| optic nerve | connects the eye to the brain |
| tympanic membrane | eardrum |
| semicircular canals | organs in the ear important in the sense of balance |
| hammer, anvil and stirrup | three small bones in the ear |
| cochlea | contains the sensory organ for hearing |
| pinna | the external part of the ear |
| eustachian tube | connects the throat to the middle ear |
| the sense of smell | olfaction |
| taste buds | sensory receptors for taste |
