STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Pancreas tissue. Coloured scanning electron micrograph (SEM) of fractured pancreas tissue, showing numerous acinar cells, containing secretory zymogen granules. Digestive enzymes are secreted in the zymogen granules, and passed to the small intestine through the pancreatic ducts. Magnification: x1600 when printed 10 centimetres wide.
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