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| Description: The two types of photoreceptors, rods and cones, lie at the very rear of the retina, beneath layers of signal-processing neurons. Picture Stats: Views: 109 Filesize: 280.05kB Height: 648 Width: 1541 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=47682 Keywords: Rods, Cones |