Sphincter example sentences

The CNS passes on motor messages to initiate the contraction of smooth muscles of the bladder and simultaneous relaxation of the urethral sphincter causing the release of urine.The opening of the stomach into the duodenum is guarded by the pyloric sphincter.The bile duct and the pancreatic duct open together into the duodenum as the common hepato-pancreatic duct which is guarded by a sphincter called the sphincter of Oddi.A muscular sphincter (gastro-oesophageal) regulates the opening of oesophagus into the stomach.The gastro-oesophageal sphincter controls the passage of food into the stomach.