False-colour SEM of an Islet of Langerhans

False-colour SEM of an Islet of Langerhans

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Credit: DR L. ORCI, UNIVERSITY OF GENEVA/SCIENCE PHOTO LIBRARY

Caption: False-colour scanning electron micrograph of the surface of a single islet of Langerhans from a mammalian pancreas. About one million islets are scattered throughout the pancreas. Some 3,000 cells in each islet secrete a variety of hormones. The most numerous are the insulin-producing (beta) cells which secrete insulin directly into the bloodstream. Insulin's main role is in controlling the transport of glucose; insulin deficiency results in diabetes. Other hormones secreted by different cells in the islet include glucagon, pancreatic polypeptide, and somatostatin. Magnification: x233 at 35mm size.

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Keywords: anatomy, endocrine, endocrine pancreas, false-coloured, human body, insulin, islet of langerhans, pancreas, synthesis of

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