Lab: Eyes/Sight Flashcards
found on the anterior of planaria
ocelli
type of cell that surrounds the photoreceptor neurons to shade them and absorb light
pigmented cells
found in the center of each ocellus that absorb light to transmit into stimuli
photoreceptor neurons
neurons send stimuli to the
anterior ganglia
(jellyfish) contain a sensory structure that has one part for detection of gravity and another that detects light
rhopalia
part of the rhopalia that detects light
ocelli
each eye is composed of hundred of thousands identical optical units; compound eyes
ommatidia
a crystalline cone that funnels light into photoreceptors; compound eye
corneal lens
thousands of facets create a mosaic, wide-range view of patterns and movement; compound eye
photoreceptors
image-forming eyes focus light into the internal surface
retina
image-forming eyes only have a s—– l—, instead of thousands
single lense
light sensitive aspect (rod and cones) found in the retina
photoreceptors
sheep eye: found on the posterior end of the eye, sends stimuli from the image-forming eye to other neurons
optic nerve
sheep eye: portion of retina that gather to form the optic nerve
optic disc
sheep eye: white surface of the eye, reaches all the way round the eye
sclera
sheep eye: cloudy surface over the pupil and iris, front-most part of the eye
cornea
sheep eye: hard sphere found behind the pupil
lens
sheep eye: gelatinous mass filling most of the interior
vitreous body
sheep eye: black ring of smooth muscle that changes the shape of the lens, found just near the lens
ciliary body
sheep eye: thin membrane found along the back wall of the whole eye containing rods and cones
retina
sheep eye: dark layer behind the retina that absorbs light, colorful when looked at with naked eye
pigmented choroid coat
area of the eye that forms the optic disc contains no rods or cones
blind spot
