The Human Eye

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15 Terms

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cornea

clear protective layer in the front of the eye

<p>clear protective layer in the front of the eye</p>
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pupil

a circular opening that controls how much light enters the eye

<p>a circular opening that controls how much light enters the eye</p>
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iris

the colored part of your eye, adjusts the size of the pupil

<p>the colored part of your eye, adjusts the size of the pupil</p>
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retina

the back of the the inside of the eyeball, contains light-sensitive rods and cones

<p>the back of the the inside of the eyeball, contains light-sensitive rods and cones</p>
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optic nerve

receives messages from the retina and then transmits messages to the brain

<p>receives messages from the retina and then transmits messages to the brain</p>
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rod cells

cells located in the retina that respond to and recognize black and white

<p>cells located in the retina that respond to and recognize black and white</p>
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cone cells

cells located in the retina that respond to and recognize color

<p>cells located in the retina that respond to and recognize color</p>
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vitreous humor

the transparent, jelly-like tissue filling the eyeball behind the lens.

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sclera

the white outer layer of the eye, provides support for the eyeball and allows attachment of muscles to the eyeball

<p>the white outer layer of the eye, provides support for the eyeball and allows attachment of muscles to the eyeball</p>
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aqueous humor

watery liquid found between the cornea and lens

<p>watery liquid found between the cornea and lens</p>
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fovea

the central focal point in the retina, around which the eye's cones cluster

<p>the central focal point in the retina, around which the eye's cones cluster</p>
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ciliary body

ring of tissue behind the iris that holds the lens in place and changes the shape of the lens

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lens

the transparent structure behind the pupil that changes shape to help focus images on the retina

<p>the transparent structure behind the pupil that changes shape to help focus images on the retina</p>
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lacrimal gland

gland located in the upper outer region above the eyeball that secretes tears

<p>gland located in the upper outer region above the eyeball that secretes tears</p>
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lacrimal duct

the passageway that drains excess tears into the nose (#5 in the image)

<p>the passageway that drains excess tears into the nose (#5 in the image)</p>