LYMPHATICS IN THE STOMACH OF THE EMBRYO PIG. 15 



DESCRIPTIONS OF PLATES. 

 PLATE 1. 



Fia. 4. Pig embryo, 60 mm. Anterior view of stomach showing relation of the lymphatics of the lesser curvature to 

 those of the liver and diaphragm. The vessels of the splenic mesentery may be seen extending from 

 beneath the spleen to the greater curvature along which they have grown. Anastomosis has already 

 taken place between these vessels, growing toward the right along the greater curvature, and lym- 

 phatics from the lesser curvature, which may be seen coming from the posterior wall of the pylorus. 

 Anastomosis of the ascending duodenal vessels at this point is also shown. (X19.) 

 A. Duo. V., Ascending duodenal vessels; D., diaphragm; D. V., diaphragmatic vessels; H., liver; H. V. 

 hepatic vessels; S., spleen; V. G. C., vessels of the greater curvature; V. L. C., vessels of the lesser curva- 

 ture; V. S. M., vessels of the splenic mesentery. 



FIG. 5. Pig embryo, 40 mm. Posterior view of injected stomach showing the main mass of lymphatics which reach 

 the stomach at the lesser curvature and their growth over the posterior stomach wall. The vessels 

 of the splenic mesentery are also here seen to anastomose with those extending from the lesser curvature. 

 These vessels, which reach the stomach by way of the gastrosplenic ligament, are also shown beginning 

 to extend to the right and left along the greater curvature. The spleen lies in its usual position. The 

 cardiac pouch is well marked in this specimen. (X 20.) 



C. P., cardiac pouch; 0., esophagus; P., pylorus; S., spleen; V. G. C., vessels of the greater curvature; 

 V. L. C., vessels of the lesser curvature; V. S. M., vessels of the splenic mesentery. 



PLATE 2. 



FIG. 6. Pig embryo, 50 mm. View of stomach from right. The organ has been tilted forward to show the great mass 

 of lymphatics arising from the retropcritoneal sac behind it. The vessels to the duodenum and their 

 extension toward the stomach are shown. Lymphatics from the retroperitoneal sac, some of which 

 ramify over the diaphragm, others piercing it to reach the lungs, are also seen. The thoracic duct lies 

 at the left of the illustration. (X15.) 



A. Duo. V., ascending duodenal vessels; D., diaphragm; Duo. M., mesentery of the duodenum; D. V., 

 lymphatics of the diaphragm; H., liver; H. V., hepatic vessels; L., lung; Pul.. V., pulmonary 

 vessels, R. P. S., anterior end of retroperitoneal sac; T. D., thoracic duct; V. L. C., vessels of the lesser 

 curvature. 



FIG. 7. Embryo pig, 30 mm. long. Anterior view of specimen from which the liver has been removed but the gastro- 

 hepatic ligament left intact. The dark line, along whose edges are seen cut ends of lymphatics, marks 

 the area from which the liver has been taken. These open vessels are those of the hepatic capsule. The 

 manner in which the lymphatics of the lesser curvature reach the stomach by way of the gastro-hepatic 

 ligament and their relations to the lymphatics of the liver are shown here. The branch of the left 

 gastric trunk passing to the cardiac pouch is also illustrated. The diaphragm may be seen posterior to 

 the cut edge of hepatic peritoneum. (X17.5.) 



C. P., cardiac pouch; D., diaphragm; Duo., duodenum; D. V., diaphragmatic vessels; H. V., hepatic 

 vessels; L. G. T., left gastric trunk; 0., esophagus; P. V., pyloric vessels; V. L. C., vessels of the lesser 

 curvature. 



PLATE 3. 



FIG. 8. Embryo pig, 150 mm. long. Dorsal view of stomach which has been cut along its anterior surface parallel 

 to the greater curvature and the specimen spread out to show the relation of the lymphatics of the 

 lesser curvature to those of the anterior and posterior walls of the stomach. The greater curvature is 

 marked by the vessels which have their course along its border (V. G. C.). It may be noticed that 

 the superficial plexus is composed of vessels whose general course is at right angles to the curvatures, 

 while the deep plexus consists in a much denser, homogeneous mass of lymphatics. (X12.) 

 A. W., anterior wall of stomach; D. G. P., deep gastric plexus (plexus of the submucosa) ; 0., esophageal 

 opening; P., pylorus; Pan., pancreas; P. W., posterior wall of stomach; R.P.S., retroperitoneal sac; 

 S., spleen; V. G. C., vessels of the greater curvature; V. L. C., vessels of the lesser curvature. 



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