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.
Houston has a fleet of taxis, limos and town cars available. For the fastest pick up, try Yellow Cabâs Hail A Cab app or Lone Star Cabâs Taxi Magic app. Houstonâs METRORail provides easy transportation from downtown Houston through the Museum District and Medical Center to NRG Park. Additional lines will open in 2014 and beyond. Houston has over 1,200 buses available through METRO with a local one-way faire of $1.25.