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