STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Stomach lining. Coloured scanning electron micrograph (SEM) of the inner lining of the stomach (gastric mucosa). The indents are gastric pits. These contain cells that secrete enzymes, mucous and hydrochloric acid into the stomach. Magnification: x40 when printed 10 centimetres wide.
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