Islets of Langerhans


Cell, Islet

Cells, Islet

Endocrine Pancreas

Islands of Langerhans

Islet Cell

Islet Cells

Islet, Pancreatic

Islets, Pancreatic

Langerhans Islands

Langerhans Islets



Pancreas, Endocrine

Pancreatic Islet

Pancreatic Islets

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.