Hormones, Eye, Sensitivity

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What do eyes in light do
pupils need to get small so radinal cells do not over excited. Circular muscles contract to make iris thicker
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What do eyes do in darkness
need to get bigger so enough light can reach the retina to form an image. Radinal muscles contract to make iris thinner
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Conjuctiva
Lubricates and protects the surface of the eye
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Optic Nerve
Carries electrical impulses from receptors to the brain
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The Lens
Focuses the light
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pupil
Lets the light into the eye
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Iris
Controls diameter of pupil
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Sclera
Tough outer surface of the eye which protects the eye
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Retina
Light sensitive rods and cones. Sends messages to optic nerve to send them ti brain
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Other cards in this set

Card 2

Front

What do eyes do in darkness

Back

need to get bigger so enough light can reach the retina to form an image. Radinal muscles contract to make iris thinner

Card 3

Front

Conjuctiva

Back

Preview of the front of card 3

Card 4

Front

Optic Nerve

Back

Preview of the front of card 4

Card 5

Front

The Lens

Back

Preview of the front of card 5
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