Crayfish compound eye, light micrograph

Crayfish compound eye, light micrograph

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Credit: DR KEITH WHEELER/SCIENCE PHOTO LIBRARY

Caption: 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.

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Keywords: anatomical, anatomy, animal, astacus astacus, biological, biology, cell, cells, compound eye, cornagean, crayfish, crustacean, crystalline cone, crystalline cones, cuticular lens, cuticular lenses, fauna, freshwater crayfish, histological, histology, invertebrate, invertebrates, layer, layers, lens, lenses, light micrograph, light microscope, longitudinal, marine biology, nature, ommatidia, ommatidium, pigment cell, pigment cells, retina, retinal, section, sectioned, sense, shellfish, sight, simple eye, simple eyes, vision, wildlife, zoological, zoology

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