It is called the pyloric valve.
The small intestine is situated between and continuous with the stomach and the large intestine.
Actually The small intestine is not connected to the stomach. Between the stomach and the small intestine is the Duodendum. At the end of the small intestine the colon, or large intestine begins.
The duodenum is the valve between the stomach and the small intestine.
pyloric sphincter valve pyloric sphincter valve
The sphincter muscle, or ileocecal valve is located at the junction of the small and large intestine.
The Pyloric Sphincter controls the movement of food between the stomach and the small intestine.
It is called the Pylorus.
The cardiac sphincter is the valve between the esophagus and the stomach.
The ileocaecal valve.
The hole that allows food from the stomach into the small intestine is called the pylorus. It is a muscular valve located at the lower end of the stomach. When it relaxes, it allows the partially digested food (chyme) to pass from the stomach into the small intestine.
Between the stomach-small intestine is the Pyloric. Between the small intestine and large intestine is the ileo-caecal. Then 2 sphincters at the end of the "process:" one to send messages to your brain to tell you to go to the bathroom and one to "control" yourself.
The duodenum is only the first portion of the small intestine. The small intestine comprises the duodenum, the jejunum, and the ileum. Following the ileum of the small intestine is the ileocecal valve, which separates the small intestine from the large intestine. The duodenum is separated from the stomach by the pyloric sphincter.