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Endocrine pancreatic cell types and their peptide secretions. Exocrine pancreatic acinar cells constitute most of the pancreatic tissue, these cells produce digestive enzymes which are transported via the pancreatic ducts. The endocrine pancreas is illustrated with all cell types; alpha, beta, delta, PP, and epsilon. The cells are arranged in compact islets and secrete a number of classical and ‘nonclassical’ peptides, as depicted. PP indicates pancreatic polypeptide.
