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The endocrine pancreatic tissue consists of small, discrete clusters of cells, called islets of Langerhans (also called pancreatic islets), scattered throughout the exocrine pancreatic lobules Unlike the exocrine pancreatic acini, which secrete into a ductular system, cells of the islets of Langerhans secrete directly into small fenestrated capillaries that are integrated withinPancreatic Histology Exocrine Tissue The pancreas is surrounded by a very thin connective tissue capsule that invaginates into the gland to form septae, which serve as scaffolding for large blood vessels Further, these septae divide the pancreas into distinctive lobules, as can clearly be seen in the image of mouse pancreas below (H&E)Exocrine part of the pancreas Histologically, the exocrine part of the pancreas shows the typical structure of the serous gland and represents roughly 98% of the organ's tissue The acini consist of strong basophilic cells, which contain numerous secretory granules Acini are...