passage of gas from the rumen into the oesophagus was followed by passive gaseous distension of the caudal thoracic oesophagus for period of 540 2860 ms ( n = 80 ) , at the end of which there was both electromyographic and radiographic evidence of oesophageal contraction .
C0014876
oesophagus
C0227188
thoracic oesophagus