The spincters located in the esophagus are: the upper sphincter at the top and the lower (the cardiac sphincter) at the bottom of the esophagus. They regulate the food passing through the esophagus.
I will take a guess at this question. I think it is the Cardiac Sphincter.
The pyloric sphincter regulates passage of chymefrom the stomach
The anus is the opening at the end of the digestive tract through which waste (feces) is expelled from the body. It is controlled by a ring of muscles called the anal sphincter, which relaxes to allow feces to pass out of the body.
The English name is pyloric sphincter (i.e. pylori has a c at the end). The Latin is sphincter pylori. This is a sphincter muscle at the lower end of the stomach controlling the amount of food being released into the duodenum.
The Lower Esophageal Sphincter.
Mouth, pharynx, epiglottis, esophagus, stomach, pyloric sphincter, bile duct, duodenum, small intestine, large intestine, appendix, large intestine, rectum, anal sphincter, anus. In order from beginning to end.
intestine
The large end of the pigs digestive tract
The ring of muscle at the entrance to the stomach is the lower esophageal sphincter. This muscle is normally contracted to close the esophagus. At the lower end of the stomach food passes through the pyloric sphincter and into the duodenum of the small intestine.
Both the upper and lower ends of the stomach have a sphincter that regulates flow into and out of the stomach. The lower esophageal sphincter is at the top of the stomach, and the pyloric sphincter is at the lower end of the stomach.
The gastrointestinal tract is equipped at critical junctures with a number of muscular valves, or sphincters , which, usually under the direction of the autonomic nervous system, can regulate the movement of food through the digestive tube. Another function of a sphincter is to prevent backflow of partially digested food.The first of these pursestring valves occurs at the cardia , the opening where the esophagus meets the stomach, and is called the cardiac sphincter , from its location almost directly in front of the heart. Another important muscle ring is the pyloric sphincter , at the opening called the pylorus , located at the other end of the stomach, at the connection between stomach and small intestine. The release of waste from the rectum is controlled, partly voluntarily, by an anal sphincter , located at the anus , which marks the end of the tract.
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