Pancreas

an elongated lobulated retroperitoneal gland extending from the duodenum to the spleen

Description
The pancreas consists of a flattened head (caput) within the duodenal concavity, an elongated three-sided body extending transversely across the abdomen, and a tail in contact with the spleen. The gland secretes from its exocrine part pancreatic juice that is discharged into the intestine, and from its endocrine part the internal secretions, insulin and glucagon.