1 The pancreas is an abdominal gland situated behind the stomach in the upper abdomen.  The main function of the pancreas is to secrete hormones and enzymes that help with digestion and regulate blood sugar (glucose) metabolism.
See also: List of tram and light rail transit systems. The Shanghai Metro is the longest metro system by route length. The Beijing Subway is the metro system with the highest ridership. The New York City Subway has the most stations.
The Parking System is the largest downtown underground public parking system in the United States and is believed to be the largest underground parking system in the world. See Section II â Parking System Description. The City and the Park District City of Chicago.