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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Regurgitation of food back from stomach into oesophagus is prevented by
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The correct answer is  Regurgitation of food back from stomach into oesophagus is prevented by: (i) tone of gastro-oesophageal sphincter, (ii) negative intrathoracic pressure, (iii) pinch-cock effect of diaphragm, (iv) mucosal folds, (v) oesophagogastric angle and (vi) slightly positive intra-abdominal pressure. Ref:- Dhingra; pg num:-341