THE ABDOMINAL CAVITY 291 



on the sloping ledge which supports it. This movement is 

 rendered possible by the accompanying slight descent of the 

 diaphragm and the elasticity and loose attachment of the living 



FIG. 91. Normal Hypertonic Stomach. The black circle is on the umbilicus, 

 and the pylorus lies to the right side of the body of the third lumbar 

 vertebra. 



peritoneum (p. 276). At the same time the pylorus undergoes 

 a similar change of position, which is permitted not only by the 

 two factors just mentioned, but also by the mobility of the 

 first inch of the duodenum. Owing to the constancy with which 

 this downward movement has been observed in radiograms 



