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7.3 part 3
human eye pat
5
Science
8th Grade
04/14/2011

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Term
retina
Definition
the light-sensitive area at the back of the human eye on which the image is focused on; it is made of two kinds o cells
Term
rods
Definition
are active in dim light sensing shades of gray; located along the outer edges of the retina
Term
cones
Definition
are active in bright light and yellow you to see colors and details, located in the center of the retina
Term
optic nerve
Definition
a bundle of nerves on the back of the eye ball that sends electricalsignals from the retina to the brain
Term
brain
Definition
intrprets the nerve signals from the optic nerve as visual images.
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