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.
Buses from Indianapolis to Atlanta. Greyhound is the largest bus carrier in the US. Spanning all the way from the East Coast to the West Coast, they cover over 1000 cities all over the United States. MegaBus is an intercity bus service providing clean, and dependable rides to major cities in the USA.