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9.5 MB (1.1 MB compressed)
1920 x 1737 pixels
16.3 x 14.7 cm ⏐ 6.4 x 5.8 in (300dpi)
STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Pancreatic secretory cells. Coloured scanning electron micrograph (SEM) of a freeze-fracture through a healthy pancreas, showing the secretory tissue. This is part of the exocrine pancreas, whose cells (brown) secrete an enzyme-rich fluid into the small intestine, through the pancreatic duct. The enzymes in the fluid are secreted by zymogenic granules (red) in the cells. The enzymes are activated when they enter the small intestine, where they degrade the proteins, lipids, carbohydrates and nucleic acids in ingested food. Magnification: x1350 at 6x7cm size.
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