KELATIONS AND CONNEXIONS OF THE STOMACH. 



1169 



he incisura angularis on the lesser curvature, and to the notch on the greater 

 .urvature already described. It forms a rounded chamber, capable of great disten- 

 iion, but when the stomach is empty it contracts to a narrow tube-like structure. 

 Is the stomach is seldom completely empty, the body usually tapers from the 

 undus to the proximal end of the pyloric portion (Fig. 925). 



Pars Pylorica. The pyloric portion of the stomach extends from the incisura 

 ,ngularis in the lesser curvature, and a variable and inconstant notch on the 

 greater curvature, as far as to the pyloric orifice (Fig. 925). 



It differs from the body of the stomach in being more tubular in shape, and 

 assessing thicker walls. 



It has been divided anatomically into two portions, the pyloric canal and the 

 ,ntrum pyloricum respectively. 



The pyloric canal is a short more or less tubular portion rather more than 

 ,n inch in length, extending from the sulcus intermedius on the greater curva- 

 ure to the pyloric constriction. The proximal portion, called the pyloric antrum, 



Incisura angularis 



Lig. teres 



Corpus ventriculi 

 Pancreas 



Fold of stomach wall 

 Pylorus 



Vesica fellea 



rnentum inaj 



Ductus hepaticus 

 and arteria 

 cystica 



. Vena portse 



, Vena cava 

 inferior 



Splenic artery 

 anterior to supra- 

 renal gland 



Left kidnej 



Diaphragm 



Left cms of diaphragm 



abdomiua 



Ductus , 



thoracicus Cauda equiua 1st lumbar 

 vertebra 



J. 920. TRANSVEKSE SECTION OF THE TKUNK AT THE LEVEL OF THE FIKST LUMBAR VERTEBRA. 

 Showing relations of stomach, pancreas, kidneys, etc. From a subject ten years old. 



i more expanded. It is not clearly demarcated from the body of the stomach 

 y any constant line of division on the greater curvature. On the lesser curvature 

 xtends from the incisura angularis to the pyloric canal, and it is occasionally 

 ouched outwards on the side of the greater curvature so as to form a chamber or 

 ouch, the " camera princeps " of His. 



KELATIONS AND CONNEXIONS OF THE STOMACH. 



iVhen the stomach has been removed, after the body has been hardened, a chamber or recess 

 exposed, known as the stomach chamber. It is (Figs. 920 and 921) a space in the upper and 

 ft portion of the abdominal cavity which is completely occupied by the stomach when that 

 gan is distended, but into which the transverse colon also passes, doubling up in front of the 

 omach, when the latter is empty. 



The chamber presents an arched roof, an irregularly sloping floor, and an anterior wall, 

 he roof is formed partly by the visceral surface of the left lobe of the liver, and in the rest of 



75 



