i8o THE POCKET ANATOMY 



lying behind inferior vena cava. The great splanchnic nerve 

 enters its upper end. 



The diaphragmatic or phrenic plexus accompanies the 

 arteries to the diaphragm. On the right side near the supra- 

 enal body is the phrenic ganglion, connecting together the 

 phrenic nerves of the spinal and sympathetic systems. 



The supra-renal plexus is derived from the solar plexus 

 and the outer part of the semilunar ganglion. It is joined by 

 branches of one of the splanchnic nerves. 



The renal plexus is derived from the semilunar ganglion, 

 and partly from the solar and aortic plexuses, and receives 

 the smallest splanchnic nerve. It lies along the renal artery, 

 and contains numerous small ganglia. 



The spermatic plexus comes off from the renal and aortic 

 plexuses. 



The cceliac plexus is derived from the solar plexus. It 

 surrounds the coeliac axis, and subdivides into : 



The coronary plexus accompanies coronary artery along the 

 smaller curvature of the stomach, communicating with the 

 pneumogastric nerves. 



The hepatic plexus accompanies hepatic artery into the sub- 

 stance of the liver. Communicates with the left vagus, and 

 the right supra-renal plexus. Gives off the cystic, pyloric, 

 right gastro-epiploic and pancreatico-duodenal plexuses. 



The splenic plexus accompanies splenic artery to the spleen, 

 and is joined by the right pneumogastric. It gives off the 

 left gastro-epiploic and pancreatic plexuses. 



The superior mesenteric plexus accompanies superior 

 mesenteric artery. 



The aortic plexus lies on the anterior surface of the 

 abdominal aorta. It gives off the inferior mesenteric and part 

 of the spermatic plexuses. It ends in the hypogastric plexus. 



The HYPOGASTRIC PLEXUS lies between the two common 

 iliac arteries ; it is formed by the terminations of the aortic 

 plexus, together with branches from the lumbar ganglia. It 

 divides below into two parts, which form the pelvic plexuses. 



The PELVIC PLEXUSES : two in number. Each is com- 

 posed of a division of the hypogastric plexus, joined with 

 some branches from the 3rd and 4th sacral nerves and 

 ganglia. 



The following plexuses are derived from the pelvic 

 plexuses : 



The hsemorrhoidal plexus to the rectum and anal canal. 



The vesical plexus to the bladder, with secondary plexuses 

 in the male to the vas deferens and to the vesiculae seminales. 



