Accessory Structures and Function of the Eye and Ear
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9 Terms
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Accessory structures of the eye
Eyelids, conjunctiva, lacrimal apparatus, extrinsic eye muscles, lacrimal caruncle.
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Tarsal glands
Produce oily secretion that lubricates the eye.
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Conjunctiva
Secretes mucus to lubricate and keep the eyeball moist.
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Lacrimal apparatus
Produces tears (cleansing, protective, moisturizing) and drains them into the nasal cavity.
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Number of extrinsic eye muscles
Six.
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Outer layer of the eyeball
Fibrous layer (sclera and cornea).
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Function of the sclera
Protective 'white of the eye.'
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Function of the cornea
Transparent window for light entry; well-supplied with pain fibers.
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Middle layer of the eyeball
Vascular layer (choroid
Note 
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