The pancreas is an organ which is about the size of a hand.
The pancreas is in the upper tummy (abdomen) and lies behind the stomach and guts (intestines). The pancreas has a connection via a tube (duct) to the first part of the gut (known as the duodenum) which is connected to the stomach. This connecting duct allows the chemicals (enzymes) produced by the pancreas to pass into the intestines.
This is a companion discussion topic for the original article at https://patient.info/news-and-features/what-does-the-pancreas-do