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25 Cards in this Set
- Front
- Back
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hollow fluid-filled sphere |
eyeball |
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tissue layers in the eye wall |
tunics |
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what are the three tunics |
fibrous, vascular, nervous |
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whats the outer tunic |
fibrous |
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whats the middle tunic |
vascular |
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whats the inner tunic |
nervous |
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white of the eye |
sclera |
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two ***** found in fibrous tunic |
sclera and cornea |
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maintains eye shape, protects internal structures, provides attachment sites for eye muscles |
sclera |
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permits light to enter |
cornea |
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bends and refracts light |
cornea |
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which tunic contains eye blood vessels |
vascular tunic |
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what are the three ***** under vascular tunic |
choroid, ciliary body, iris |
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appears black |
choroid |
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why do choroids appear black |
vascular network and melanin pigment cells
also they absorb light |
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the colored part of the eye |
iris |
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light passes through two structures |
pupil and iris |
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regulates amount of light entering |
iris |
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three ***** under nervous tunic |
retina, rods, cones |
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what are the two layers in retina? |
outer pigmented and inner sensory |
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which layer of the retina keeps light from reflecting back to the eye |
outer pigmented |
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which layer of the retina has photoreceptor cells |
inner sensory |
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sensitive to light |
rods |
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functions in dim light |
rods |
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photosensitive pigment |
rhodopsin |
