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Ch. 24 Ear and Eye

Across
The pigmented muscular portion of the choroid that surrounds the pupil and can change its diameter
The outer layer of the eye; often called the white of the eye
The clear, jelly-like substance that fills the large chamber behind the lens
The nerve that receives the impulses from the photoreceptors in the retina and sends the impulses to the brain
The canals that work with other structures to provide a sense of balance
The fluid that fills the chamber between the lens and the cornea
Receives vibrations from the stapes and transforms them into nerve impulses to be sent to the brain
Third and innermost layer of the eye; contains thousands of specialized neurons that are photoreceptors that can be stimulated by light
Down
One of the 3 tiny bones in the middle ear that pick up vibrations from the tympanic membrane and carry them to the inner ear
Glands in each eyelid that secretes the fluid that is evenly spread over the eyeball each time you blink; the fluid lubricates the eyelid and moistens and cleans the cornea and it also contains an enzyme that kills bacteria
The middle layer of the eye; thin and fragile; contains many blood vessels for nourishing the inner part of the eye
The membrane that is also called the eardrum; vibrates when sound wave hits it
A transparent portion of the sclera at the front of the eye that allows light to pass through
Hole which allows light into the inner part of the eyeball