ABDOMINAL CAVITY 



37 



of separation between the body and the pyloric portion, and 

 between the two segments of the pyloric portion, are less 

 evident or are altogether absent (see Figs. 122, 124, 125, 126). 

 In certain phases of digestion the lower part of the body 

 and the whole of the pyloric portion form together a tubular 

 canal, along which waves of contraction pass to and fro, 

 churning the contents into a unform consistence, whilst the 

 remainder of the body and the fundus form a kind of passive 



Pyloric canal of stomach 

 Inferior vena cava \ 

 Duodeno-pyloric constriction \ \ CEsophagus 



Right suprarenal gland \ \ \ 



Duodenum (ist part) \ \ flfSf Stomach 



Kidney (right) \ \ \ \\\fl '/ Spleen (colic 



\ \ ^t-^=_V:- , \'\'\1 / .. surface) 



Duodenum (2nd part) / / ,- .. - 



/ I Ian of pancreas 



Head of pancreas j \ Kidney (left) 



Superior mesenteric vessels Left suprarenal gland 



J Ureter 

 Duodenum (yd part) 



FIG. 144. Horizontal position of the Stomach in a Child two years old ; 

 viscera hardened by formalin injection. 



reservoir, from which food is squeezed into the more actively 

 contracting segment, as the thoroughly churned material 

 intermittently escapes thiough the pyloric orifice into the 

 duodenum. 



Position of the Stomach. When empty and contracted the 

 stomach lies more or less horizontally within the abdominal 

 cavity ; it is placed within the left hypochondrium and the 

 left portion of the epigastrium. The organ is bent on itself 

 like a sickle and the fundus looks directly backwards ; the 

 surfaces are directed upwards and downwards and the curva- 



ii 20 a 



