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Coloured SEM of rod cells in the retina of the eye
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Coloured SEM of rod cells in the retina of the eye
Rod cells. Coloured scanning electron micrograph (SEM) of a group of rod cells in the retina of the eye. Rod cells are light sensitive cells which respond to dim light, and are mainly used for dark adapted vision. They cannot detect colours, which is why vision in low light conditions is limited to shades of grey. When light falls on the tip of a rod cell, a chemical reaction sends an electrical impulse to the optic nerve (not shown), which relays it to the visual cortex of the brain. Magnification unknown
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Media ID 6422366
© STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY
Retina Rod Cell Rods Sight Vision Visual Sense
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This print showcases the intricate beauty of rod cells in the retina of the eye. In this coloured scanning electron micrograph (SEM), a group of rod cells is depicted, highlighting their crucial role in our visual system. Rod cells are specialized light-sensitive cells that play a vital role in dim light conditions, enabling us to see during dark-adapted vision. However, they lack the ability to detect colors, which explains why our low-light vision is limited to shades of grey. When light touches the tip of a rod cell, it triggers a chemical reaction that generates an electrical impulse. This impulse then travels through the optic nerve (not visible in this image) and ultimately reaches the visual cortex in our brain for processing. The magnification used to capture this stunning image remains unknown but serves as a reminder of how microscopic structures can hold immense significance within our bodies. The complexity and precision exhibited by these photoreceptive cells highlight nature's remarkable design. This photograph not only provides insight into human anatomy but also emphasizes the importance of sight and vision as fundamental aspects of our existence. It serves as a testament to scientific exploration and discovery while reminding us of both the wonders and intricacies found within ourselves.
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