Crayfish compound eye, light micrograph
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Crayfish compound eye, light micrograph
Crayfish compound eye. Light micrograph of a longitudinal section through the compound eye (top) of a freshwater crayfish (Astacus astacus), showing over fifty of its thousands of simple eyes (ommatidia). The clear, outer hemispherical layer, is made up of cuticular lenses. Under this layer is another clear layer of corneagen cells, and under this layer is a layer of crystalline cones (pink and black). The bottom of the simple eye has black pigment cells (the two lower, thick black layers) that are the equivalent of the retina in mammals. Magnification: x36 when printed at 10 centimetres across
Science Photo Library features Science and Medical images including photos and illustrations
Media ID 6469939
© DR KEITH WHEELER/SCIENCE PHOTO LIBRARY
Compound Eye Crustacean Histological Histology Layer Layers Lens Lenses Longitudinal Ommatidia Ommatidium Pigment Cells Retina Retinal Sense Shell Fish Sight Simple Eye Vision Cells Cray Fish Freshwater Crayfish Light Micrograph Light Microscope Section Sectioned
EDITORS COMMENTS
This print showcases the intricate beauty of a crayfish compound eye. In this light micrograph, we are granted a glimpse into the fascinating world of these freshwater creatures. The image reveals over fifty simple eyes, known as ommatidia, which make up just a fraction of the thousands present in this compound eye. The outer layer is composed of transparent cuticular lenses that form a hemispherical structure. Beneath this lies another clear layer made up of corneagen cells, followed by a striking array of pink and black crystalline cones. These layers work together to capture and focus light onto the bottom part of each simple eye where black pigment cells reside. Remarkably similar to mammalian retinas, these pigment cells serve as the equivalent for crayfish vision. This microscopic marvel provides us with insight into their sensory perception and biological makeup. With an impressive magnification factor of x36 when printed at 10 centimeters across, this image allows us to appreciate the complexity and intricacy found within nature's creations. It serves as a reminder that even in seemingly small organisms like crayfish, there is an extraordinary world waiting to be explored under the lens of science.
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