Shark skin, light micrograph

Shark skin, light micrograph

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Credit: DR KEITH WHEELER/SCIENCE PHOTO LIBRARY

Caption: Shark skin. Light micrograph of a section through the skin of a shark, showing two dermal denticles. These bony structures cover the whole skin of the shark. Shark denticles do not overlap, unlike those of the bony fish, and they are both protective and flexible. The denticle is similar in structure to a tooth, with a thin outer layer of enamel under which is a layer of bone-like dentine. At the core is a central pulp cavity, which contains the nerves and blood vessels. The base of the denticle is sunk into the dermis. Magnification: x195 when printed at 10 centimetres across.

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Keywords: anatomical, anatomy, animal, biological, biology, bony, denticle, denticles, dentine, dermal denticle, dermis, enamel, epidermis, fauna, ichthyology, light micrograph, light microscope, lm, longitudinal, marine biology, nature, pulp, root, section, sectioned, shark, shark's, skin, tooth-like, wildlife, zoological, zoology

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