Retina rod cells, SEM

Retina rod cells, SEM

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Caption: Retina photoreceptor rod cells. Coloured scanning electron micrograph (SEM) of a freeze-fractured section through a retina. The fracture plane (across bottom) has passed through the Muller cell layer. This layer supports the photoreceptor cells above. These are rod photoreceptor cells that contain rhodopsin (visual purple), a protein that aids vision in dim light. The cone photoreceptors that detect colour are not seen. The back layer (pigmented epithelium) of the retina would lie across top, but it has been removed. The surface of the retina is off bottom. Light reaching these photoreceptor cells, triggers signals that are sent to the brain.

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Keywords: anatomical, anatomy, biological, biology, coloured, dim light vision, eye, false-coloured, freeze fractured, freeze-fractured, muller cell layer, photoreceptor, retina, rhodopsin, rod cells, scanning electron micrograph, scanning electron microscope, section, sectioned, sem, sense, sight, vision, visual purple

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