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Pancreatic cells, TEM
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Pancreatic cells, TEM
Pancreatic cells. Coloured transmission electron micrograph (TEM) of an acinar (exocrine) pancreatic cell (blue) adjacent to an hormone- secreting (endocrine) Islet of Langerhans cell (green). Acinar cells secrete zymogens (inactive digestive enzymes) in vesicles called zymogen granules (large purple blobs, left), which then become activated when in the small intestine. Islet of Langerhans cells regulate blood sugar levels by secreting hormones such as insulin and glucagon, that are also transported out of the cell by granules (small blue dots, right). The large orange bodies (centre right and top right) are nuclei and the small brown organelles seen throughout are mitochondria
Science Photo Library features Science and Medical images including photos and illustrations
Media ID 6451311
© STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY
Acinar Blood Sugar Digestion Digestive Enzymes Glucagon Insulin Islets Micrograph Mitochondria Organelle Organelles Pancreas Pancreatic Transmission Electron Transmission Electron Microscope Zymogen False Coloured
EDITORS COMMENTS
This print showcases the intricate world of pancreatic cells, revealing their diverse functions and structures. In this coloured transmission electron micrograph (TEM), we are granted a glimpse into the inner workings of an acinar pancreatic cell (blue) positioned alongside an endocrine Islet of Langerhans cell (green). The acinar cells play a vital role in digestion as they secrete zymogens, which are inactive digestive enzymes stored within zymogen granules (large purple blobs on the left side). These enzymes become activated once they reach the small intestine. On the other hand, Islet of Langerhans cells regulate blood sugar levels by releasing hormones like insulin and glucagon. These essential hormones are also transported out of the cell through granules depicted as small blue dots on the right side. Amidst this microscopic landscape, we can observe prominent orange bodies representing nuclei and numerous brown organelles scattered throughout that signify mitochondria – crucial for energy production within these cells. Through this remarkable image, Science Photo Library invites us to marvel at the complexity and beauty inherent in our biological makeup. It serves as a reminder that even at such minuscule scales, every component plays a significant role in maintaining our bodily functions.
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