DR KEITH WHEELER / SCIENCE PHOTO LIBRARY DR KEITH WHEELER / SCIENCE PHOTO LIBRARY
Kitten's jaw. Light micrograph of a section through the lower jaw of a kitten. In the centre is the tongue, which is covered in rough keratinised papillae. Two developing teeth are seen at bottom right and bottom left (round, purple). Magnification: x4 when printed at 10 centimetres wide.
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