FATE OF PRIMARY LYMPH-SACS IN ABDOMINAL REGION OF PIG, ETC. 31 



Relation of the Peripheral Lymphatics to the Primary System. 



I. Lymphatics arising ventral to the aorta. 



A. Retroperitoneal sac. 



1. Anterior portion. 



(a) Cceliac trunk. 



(I) Left branch. 



(A) Mesial trunk. 



(1) Adrenal (capsule) and kidney (ant. pole). 



(2) Pancreas (body). 



(3) Diaphragm. 



(4) Anterior anastomosis to thoracic duct. 



(5) Lung. 



(6) Trunk of lesser gastric curvature. 



(a) ascending (left) periesophagus, cardia, diaphragm. 



(6) descending (right) cardia, diaphragm, lesser curvature. 



(B) Left trunk. 



(1) Pancreas (tail). 



(2) G astro-splenic trunk. 



(a) Fundus of stomach. 



(6) Splenic capsule. 



(c) Vessels of greater gastric curvature ; (1) fundus; (2) pylorus. 



(II) Right branch. 



(A) Hepatic vessels. 



(B) Right gastric vessels; (1) pylorus; (2) pancreas (body). 

 (6) Lateral trunk. 



(I) Portal vein. 

 (II) Biliary ducts. 



(c) Superior mesenteric trunk. 



(I) Duodenal branch; (A) pancreas (head). 

 (II) Mesenteric branch. 



(d) Main anastomosis to cisterna chyli. 



2. Posterior portion. 



(a) Lateral branches. 

 (I) Kidney. 

 (II) Wolffian body. 



(III) Genital branch. 



(A) Gonad. 



(B) Wolffian body (caudal). 



(C) Mullerian and Wolffian ducts. 



(D) Caudal gonadal ligament. 



(IV) Umbilical cord (medial side). 



(V) Posterior anastomosis to caudal end of iliac sacs. 

 (6) Medial branch. 



(I) Descending colon. 



II. Lymphatics arising dorso-lateral to the aorta. 



A. Thoracic duct. 



B. Cisterna chyh. 



C. Iliac sacs. 



1. Diaphragm. 



2. Adrenal. 



3. Kidney. 



4. Retrorenal branch. 



5. Caudal portion. 



(a) Anastomosis with retrorenal branch. 



(b) Ilio-inguinal node. 



(c) Lateral sacral branch. 



(d) Posterior anastomosis with retroperitoneal sac. 



(e) Posterior trunk. 



(I) Proximal branches. 



(A) Umbilical cord (lateral side). 



(B) Wolffian body (posterior pole). (1) Mullerian and Wolffian ducts. 



(C) Rectum. 



(II) Common iliac trunk. 



(A) Hypogastric trunk. 



(B) External iliac trunk; (1) sciatic vessels; (2) femoral vessels; (3) inguinal vessels. 



