| A | B |
|---|
| choroid | middle layer; contains many blood vessels |
| cornea | transparent anterior part of sclera; lies over iris |
| iris | pigmented muscular structure; allows light to pass through |
| lens | lies directly behind pupil; focuses & bends light |
| optic nerve | carries visual images from retina to the brain |
| pupil | opening in the center of the iris |
| retina | innermost layer of eye; contains vision receptors |
| sclera | outer protective layer of the eye |
| auricle | external;directs sound waves to external auditory meatus |
| cochlea | snail-shaped organ of hearing; found in inner ear/labyrinth |
| eustachian tube | passage between middle ear & pharynx; equalizes air pressure on both sides of tympanic membrane |
| externa auditory meatus | short tube ending at the tympanic membrane |
| inner ear | labyrinthlike bony spaces within temporal bone of the skull; maintains a sense of balance |
| middle ear | consists of the tympanic membrane, eustachian tube & ossicles |
| ossicles | bones of the middle ear; they carry sound vibrations |
| outer ear | consists of auricle & external auditory meatus |
| tympanic membrane | semitransparent membrane that seperates the external auditory meatus and the middle ear cavity |
