SEM of rod & cone cell of the retina

SEM of rod & cone cell of the retina

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This image is part of the feature Five Senses
This image is part of the feature Windows Of The Soul

Credit: PROF. P. MOTTA/DEPT. OF ANATOMY/UNIVERSITY "LA SAPIENZA", ROME/SCIENCE PHOTO LIBRARY

Caption: False-colour scanning electron micrograph (SEM) of rod and cone cells of the eye retina. Cone cells (blue) and more numerous rod cells (pink, purple) are specialized light-sensitive cells. They occur on the surface of the retina. They are responsible for detecting visible images, which are transmit- ted as nerve impulses to the optic nerve and the brain. There are about 130 million rod cells in the human retina; they detect light intensity and so are important for day and night vision. While the less numerous cone-like cone cells (about 6.5 million in the human retina) respond specifically to colour. Magnification: x730 at 6x7cm size. Magnification: x1120 at 4x5 inch size.

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Keywords: anatomy, cell, cone cell, cones, eye, false-coloured, human body, images, magnified image, microscopic photos, retina, rod cell, rods, sight, structure, subjects, vision, visual sense

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