For 10 points, name this organ that secretes insulin.
In some individuals, the duct of Santorini connects this organ to the duodenum, as does this organ's main duct, which is alternatively named for Wirsung. This organ's delta and epsilon cells produce somatostatin and ghrelin, respectively. Glucagon is produced by this organ's alpha cells, which are found within the islets of Langerhans. Malfunction of this organ's beta cells can cause diabetes mellitus. For 10 points, name this organ that secretes insulin.
In some individuals, the duct of Santorini connects this organ to the duodenum, as does this organ's main duct, which is alternatively named for Wirsung.
{pancreas}