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.
WORLD AND THEIR MAYORS. The list of the worldâs largest cities, by land area, is headed by New York Metro, with a total area of 8,700 square kilometres. Tokyo/Yokohama is in second place with almost 7,000 square kilometres, followed by ten cities from the US.