pancreas anatomy. main duct and large papilla.

abdomen amylin anatomical anatomy bile duct circulation closeup colon cross-section design diagnosis diagram digestion digestive duodenum educational endocrine enzymes gallbladder glucagon glucose graphic green healthy hormone hospital human hypoglycemia illness illustration insulin internal islets langerhans isolated large papilla liver medical minimal mucosa folds organ pancreas pancreas pancreatic pathophysiology polypeptide process system