Eye and Ear Key Terms
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aqueous humor | Is a clear, watery fluid that fills the space between the cornea and iris, It helps maintain the forward curvature of the eyeball and refracts (bends to light rays)
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conjunctiva | mucous membrane that lines the eyelids and covers the front of the eye for protection and lubrication
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IRIS | color portion of the eye. Located behind the cornea
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LACRIMAL GLANDS | They produce tears, which moisten cleanse the eye.
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PUPIL | the opening in the center of the iris
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REFRACTS | Meaning (bends)
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RETINA | The innermost layer of the eye. It is made of many layers of nerve cells, which transmit the light impulses to the optic nerve
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SCLERA | The outermost layer of the eye, tough connective tissue. The white part of the eye
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VITREOUS HUMOR | jellylike substance that fills the area behind the lens. It helps maintain the shape of the eyeball. It refracts (bends) to light rays.
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CORNEA | CIRCULAR, TRANSPARENT PART OF THE FRONT OF THE EYE. It allows light rays to enter the eye
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CONES | nerve cells that is sensitive to color and used while it is lightness. Located in the retina area
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RODS | Nerve cells used for vision when it is dark or dim. Rods are in the retina
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LENS | is the circular structure located behind the pupil. It refracts(bends) to light rays do the rays focus on the retina.
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pinna or auricle ear | visible part of the ear, elastic cartilage covered by skin
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auditory canal | visible external canal leading into the ear
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cermen | ear wax, the was protects the ear
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tympanic membrane | separates the outer ear from the middle ear. It vibrates the sound waves to middle ear.
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Ossicles | 3 bones malleus, the incus, and the stapes. The transmit sound from tympanic membrane to inner ear
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Eustachian tube | connects the middle ear to pharynx. helps equalizes the air pressure
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vestibule | first part of the inner ear, that is an entrance into the cochlar
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cochlea | shaped like a snail's shell, it has the organ of corti, receptor of sound waves
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Semicircular canals | located in the inner ear, delicate hair-like cells that bend when liquids moves with head and body movements
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