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sclera

white of eye

cornea

the clear tissue that covers the front of the eye

retina

innermost layer of eye that perceives and transmits light to the optic nerve

conjunctiva

mucous membrane lining the eyelids and covering the anterior portion of the sclera

iris

a ring of muscle tissue that forms the colored portion of the eye around the pupil and controls the size of the pupil opening

lens

transparent structure behind the pupil that bends and focuses light rays on the retina

optic nerve

the nerve that carries neural impulses from the eye to the brain

cerumen

ear wax

eustachian tube

A narrow tube between the middle ear and the throat that serves to equalize pressure on both sides of the eardrum

cochlea

a coiled, bony, fluid-filled tube in the inner ear through which sound waves trigger nerve impulses

ossicles

three tiny bones in the middle ear

aqueous humor

watery liquid found in the anterior cavity of the eye

vitreous humor

the clear colorless transparent jelly that fills the posterior chamber of the eyeball

tympanic membrane

The eardrum. A structure that separates the outer ear from the middle ear and vibrates in response to sound waves.

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