Caption: Frog eye retinal rod and cone cells seen in cross section (Eleutherodactylus coqui). Shown here is a cross section of the receptor cells (rods and cones) in the retina (the light-sensitive tissue that lines the inside of the eye). Rod cells perceive light of different intensities, whereas cone cells allow color vision. Light triggers chemical signals in the photoreceptor cells, which are transmitted along neurons in the optic nerve (not seen) to the brain. The cell bodies of the receptor cells are located in a layer above the rods and cones.
Magnification*: x1,065
Type: SEM
Copyright 2009 Dennis Kunkel Microscopy, Inc.
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