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 New York City Subway, the largest subway system in the world by number of stations, is the primary means of travel within the city, linking every borough except Staten Island. There are 148 subway stations in Manhattan and four under construction, out of the 469 stations.