Which sphincter must relax for food to move from the esophagus into the stomach?Multiple choice question.Cardiac sphincterPyloric sphincter
Question
Which sphincter must relax for food to move from the esophagus into the stomach?
- Cardiac sphincter
- Pyloric sphincter
Solution
Answer
The correct answer is Cardiac sphincter.
Explanation
The cardiac sphincter, also known as the lower esophageal sphincter (LES), is located at the junction between the esophagus and the stomach. It must relax to allow food to pass from the esophagus into the stomach. In contrast, the pyloric sphincter is located at the exit of the stomach and regulates the passage of food into the small intestine. Therefore, for food to move from the esophagus into the stomach, the cardiac sphincter is the one that needs to relax.
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