Retinal rod cell, TEM C013 / 4804
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Retinal rod cell, TEM C013 / 4804
Retinal rod cell. Transmission electron micrograph (TEM) of a section through a rod cell from the retina of an eye, showing the inner segment (bottom) filled with mitochondria (green), and outer segment made up of stacks of folded membranes (orange). These folds contain the photo pigment rhodopsin. The retina is a thin tissue layer on the inner eye responsible for sight. Rod cells are long photoreceptor nerve cells that respond to dim light. They compliment cone cells (not shown) that detect colour. Magnification: x18, 000 when printed 10 centimetres wide
Science Photo Library features Science and Medical images including photos and illustrations
Media ID 9195065
© STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY
Detection Eyesight Fold Folds Histological Histology Membrane Membranes Mitochondria Mitochondrion Nerve Cell Neuron Neurone Neurones Neurons Ocular Outer Photoreceptor Photoreceptors Receptor Receptors Retina Retinal Rhodopsin Rod Cell Rods Segment Segments Sight Tissue Transmission Electron Micrograph Transmission Electron Microscope Vision Visual Cells Micrography Nervous System Section Sectioned Sensory System
EDITORS COMMENTS
This print showcases the intricate structure of a retinal rod cell, captured using a transmission electron microscope (TEM). The image reveals the inner workings of this vital component of our visual system. At the bottom of the cell, we see a dense cluster of mitochondria, depicted in vibrant green. These energy-producing powerhouses ensure that the rod cell functions optimally to support our vision. The outer segment of the rod cell is composed of stacked and folded membranes, portrayed in striking orange hues. These folds house an essential pigment called rhodopsin, responsible for capturing light and initiating visual signals. As part of the retina—a thin tissue layer within our eyes—the rod cells play a crucial role in detecting dim light conditions. Unlike their color-detecting counterparts known as cone cells (not shown), which enable us to perceive different hues, rod cells specialize in low-light environments. Their elongated shape allows them to efficiently capture even faint traces of light. With a magnification level equivalent to 18,000 times when printed at just 10 centimeters wide, this remarkable photograph offers us an up-close glimpse into one aspect of our complex visual anatomy. It serves as a reminder not only of the incredible intricacy found within our bodies but also highlights how scientific imaging can unveil hidden wonders that are otherwise invisible to the naked eye.
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