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Sight and Hearing

TermDefinition
Cornea The clear tissue that covers the front of the eye
Pupil The opening through which light enters the eye
Iris The circular structure that surrounds the pupil and regulates the amount of light entering the eye
Lens A curved piece of glass or other transparent material that is used to refract light; the flexible structure that focuses light that has entered the eye
Retina A sheet of light sensitive cells at the back o the eye on on which an image is focused
Rods Receptor cells in the eye that work best in dim light and enable you to see black white and gray
Cones Receptor cells in the eye that work best on bright light and enable you to see color
Optic Nerve The short, thick nerve in the eye through which rods and cones send electrical impulses to the brain
Eardrum The membrane that separates the outer ear from the middle ear, and that vibrates when sound waves strike it
Hammer A small bone in the middle ear that transmits vibrations from the eardrum to the anvil; also called the " mallenus "
Anvil A small bone in the middle ear that transmits vibrations from the hammer to the stirrup; also call the " incus "
Stirrup A small bone in the middle ear that transmits vibrations from the anvil to a membrane of the inner ear; also called the " stapes "
Cochlea A snail shaped tube in the inner ear that is lined with receptor cells that respond to sound
Semicircular Canals Structures in the inner ear that are responsible for the sense of balance
Created by: FuntomFive