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Retina rod cells, SEM
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Retina rod cells, SEM
Retina rod cells. Coloured scanning electron micrograph (SEM) of a freeze-fractured section through a retina, revealing the structure of its photoreceptors. Photoreceptors with these rod-like outer parts (green) are named rod cells (rather than cone cells) and contain the protein rhodopsin (visual purple) that aids vision in dim light. Light triggers signals in the photoreceptors after passing through a neuron layer (not seen). These signals travel to the neurons and on to the brain. Magnification: x2000 at 6x7cm size
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Media ID 6449247
© STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY
Fibrous Fracture Freeze Fractured Histology Layer Layered Layers Light Sensitive Optical Outer Photoreceptor Photoreceptors Receptor Receptors Retina Retinal Rods Sensory Sight Structural Supportive Tissue Vision Visual Sense Cells Section Sectioned
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This print showcases the intricate beauty of retina rod cells, as captured by a scanning electron microscope (SEM). The image reveals a freeze-fractured section through a retina, providing an extraordinary glimpse into the structure of its photoreceptors. These particular photoreceptors, known as rod cells due to their rod-like outer parts depicted in vibrant green hues, play a crucial role in our visual system. The protein rhodopsin, also referred to as visual purple and illustrated here in striking detail, is found within these rod cells and aids our vision in low-light conditions. As light enters the eye and passes through layers of neurons unseen in this snapshot, it triggers signals within the photoreceptors. These signals then travel along neural pathways to ultimately reach the brain. With a magnification of x2000 at 6x7cm size, this SEM image offers us an up-close exploration of this vital sensory tissue. The layered composition and structural complexity seen here highlight the remarkable anatomy of healthy retinal tissue. This visually stunning photograph not only deepens our understanding of how we perceive light but also serves as a testament to the wonders that lie within our own bodies.
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