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.
TOKYO-YOKOHAMA SUBURBAN RAIL SUMMARY (COMMUTER RAIL, REGIONAL RAIL) October 2003 Tokyo-Yokohama (Tokyo) is the worldâs largest urban area, with approximately 31,200,000 people, 1.5 times the population of the New York urban area.