Effect of stretch and force‐feeding on the oesophagus of geese

Synopsis

The effects of stretch and force‐feeding on some physiological properties of the isolated oesophagus of geese was examined. Elasticity was measured at various points, pressure‐volume relations determined and histological sections examined.

It was found that the total oesophageal volume was increased markedly by force‐feeding, particularly in the area of the crop, although the elasticity was unchanged. Enlargement was due to hypertrophy. Pressure‐volume relations indicate that a very large oesophageal volume can be attained at pressures up to 40 mmHg. It is concluded that force‐feeding does not damage the physiological characteristics of the oesophagus, and that efficient filling may be obtained at relatively low pressures.