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Sea urchin spine, SEM

Sea urchin spine, SEM

Z555/0086

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Credit

EYE OF SCIENCE / SCIENCE PHOTO LIBRARY EYE OF SCIENCE / SCIENCE PHOTO LIBRARY

Caption

Sea urchin spine. Coloured scanning electron micrograph (SEM) of a broken sea urchin spine. The spine is covered in an epidermis (brown), an outer layer of epithelial cells. The epidermis covers the skeleton of the spine (grey), which is made of calcium carbonate, or calcite, and is symmetrical. The spines, which are moveable and cover the sea urchin's shell, are used to protect it from predators. Sea urchins are marine echinoderms, relatives of the star fish. Magnification: x660 when printed at 10 centimetres wide.

Release details

Model release not required. Property release not required.

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