Facts about Pancreatic Islets

1. 06

   In adults, pancreatic islets collectively account for only about 1 to 2 percent of the total mass of the pancreas.

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2. 05

   Delta cells within pancreatic islets secrete somatostatin, which locally inhibits the release of both insulin and glucagon.

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3. 04

   Paul Langerhans first described pancreatic islets in 1869 while studying the microstructure of the pancreas as a medical student.

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4. 03

   The hormone-secreting cells of pancreatic islets receive a disproportionately rich blood supply, making them among the most densely vascularized tissues in the body.

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5. 02

   Destruction of the beta cells within pancreatic islets by autoimmune attack is the underlying cause of type 1 diabetes mellitus.

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6. 01

   Scattered throughout the pancreas, pancreatic islets contain four main cell types, including alpha cells that secrete glucagon and beta cells that secrete insulin.

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