Regurgitation of food back from stomach into oesophagus is prevented by
Pinch cock effect of diaphragm
Negative intrathoracic pressure
Oesophagogastric angle
All of the above
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
Oral cavity & Oesophagus