Human Digestive System · NCERT Biology

The opening of the stomach into the esophagus is regulated by which muscular sphincter?

  1. Pyloric sphincter
  2. Sphincter of Oddi
  3. Lower esophageal sphincter
  4. Ileocaecal sphincter
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Correct answer: Lower esophageal sphincter

The lower esophageal sphincter (also called the cardiac or gastro-oesophageal sphincter) controls the passage of food from the esophagus into the stomach. It also prevents the backflow of acidic gastric contents into the esophagus.

Difficulty: Medium Question 7 of 20

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