Anatomy [A] » Digestive System [A03] » Pancreas » Islets of Langerhans
Anatomy [A] » Endocrine System [A06] » Endocrine Glands » Islets of Langerhans
Description
Irregular microscopic structures consisting of cords of endocrine cells that are scattered throughout the PANCREAS among the exocrine acini. Each islet is surrounded by connective tissue fibers and penetrated by a network of capillaries. There are four major cell types. The most abundant beta cells (50-80%) secrete INSULIN. Alpha cells (5-20%) secrete GLUCAGON. PP cells (10-35%) secrete PANCREATIC POLYPEPTIDE. Delta cells (~5%) secrete SOMATOSTATIN. MeSH
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