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.
To gain a better understanding of the history and scope of each city and its public transportation system, MPA@UNC, the online mpa degree, has created a visualization to show how millions of Americans travel daily via mass transitâLetâs Take a Ride: 5 Largest US Public Transit Systems.