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Nov 27, 2023
1. Upper esophageal sphincter: This is the first part of the esophagus, located at the top near the throat. It is a muscular ring that acts as a valve, allowing food and liquids to enter the esophagus from the mouth.
2. Middle esophagus: This is the main part of the esophagus, extending from the upper esophageal sphincter to the lower esophageal sphincter. It is a long, muscular tube that contracts and relaxes to propel food and liquids down towards the stomach through a process called peristalsis.
3. Lower esophageal sphincter: This is the last part of the esophagus, located at the bottom near the stomach. It is another muscular ring that acts as a valve, preventing stomach acid and contents from flowing back up into the esophagus. It opens to allow food and liquids to enter the stomach and then closes to prevent reflux.
2. Middle esophagus: This is the main part of the esophagus, extending from the upper esophageal sphincter to the lower esophageal sphincter. It is a long, muscular tube that contracts and relaxes to propel food and liquids down towards the stomach through a process called peristalsis.
3. Lower esophageal sphincter: This is the last part of the esophagus, located at the bottom near the stomach. It is another muscular ring that acts as a valve, preventing stomach acid and contents from flowing back up into the esophagus. It opens to allow food and liquids to enter the stomach and then closes to prevent reflux.
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