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.
Monterrey's Central de Autobuses is the hub of bus transportation in the city and is the largest bus station in northern Mexico. The station has bays for more than 100 buses to simultaneously load or unload. It is served by more than a dozen first-class bus lines and dozens more second-class bus lines.