1156 



DIGESTIVE SYSTEM 



a branch of the splenic, the right a branch of the hepatic, through the gastro-duodenal artery. 

 The stomach also receives branches from the splenic (vasa brevia) at the fundus. The vascular 

 arches along the curvatures of the stomach are comparable to those in the intestinal mesentery 

 (Mall). 



The blood of the stomach is returned into the portal vein. The coronary vein and pyloric 

 vein open separately into the portal vein; the right gastro-epiploic vein opens into the superior 

 mesenteric, the left into the splenic. 



The arrangement and distribution of the blood-vessels within the stomach wall are illus- 



FiG. 911. — A Dissection of the Musculature of the Stomach. (Lewis and Stohr, 

 after Spalteholz.) a and e, Longitudinal layer, b and d, Circular laj-er. c. Oblique layer. 

 Py, Pylorus. *S./., Sulcus intermedius. 



trated in fig. 910. The rich capillary plexus in the mucosa supplies the glands and also serves 

 for absorption. 



Lymphatics. — There is a set of nodes lying along the lesser and the pjdoric portion of the 

 greater curvature, and others at the pyloric and cardiac ends. These are entered by lymphatic 

 vessels which, beginning in the mucous membrane (fig. 910), accompany all the gastric veins, 

 but chiefly those of the lesser curvature. Vessels also accompany the left gastro-epiploic veins 

 to terminate in the splenic nodes. On its way to the receptaculum chyli, the gastric lymph 

 passes through groups of nodes [lymphoglandulae pancreaticolienales] situated above and 

 behind the head and neck of the pancreas. 



Figs. 912 and 913.- 



Circular layer 

 Longitudinal layer 



-Dissections Showing the Muscular Layers op the Stomach. 

 (From Toldt's Atlas.) 



X 1. 



Tela submucose 



The arriuig<;iiit:iit of tiie lymphatic plexus within the stomach wall, beginning with blind 

 rootlets in th(! mucosa, is shown in fig. 910. 



Nerves. — The nerves of the stomach are derived in part from the vagi (which form the motor 

 fibres of the stomach), the right vagus descetuling on the posterior wall, and the left on the 

 anterior wall. Tlie stom;ich also r(!ceives syinj)atli(iti(! branches from the co-liac plexus, follow- 

 ing the arteries. Smiill ganglia occur along both vagus and sympathetic branc^hes (Remak). 

 The nerves join the gangliatcd plcxu.ses, myenteric and submucous, in the wall of the stomach, 



