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Why rods and conse are called the photor...

Why rods and conse are called the photoreceptor cells ?

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The rods and cones are the cells which in true sense receive the light rays emitted by the objects. The biochemical changes of vision start with the working of these cells when their photopigments breakdown. As these cells receive the 'light', that is why they are called the photoreceptor cells.
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