THE SYMPATHETIC PLEXUSES 379 



with branches from the phrenic nerve, and at the point of 

 junction on the right side is a small ganglion, the diaphragmatic, 

 on the under side of the diaphragm. 



The suprarenal plexus receives branches from the phrenic 

 plexus and great splanchnic nerves. At the point where the 

 latter join is a ganglion. 



The renal plexus receives filaments from the aortic plexus 

 and the small and smallest splanchnics. The branches run 

 along the renal artery, and send filaments to the spermatic 

 plexus and to the inferior cava. 



The spermatic plexus is derived from the renal and aortic 

 plexuses, and runs on the spermatic vessels. In the female 

 (ovarian) it supplies the uterus and ovaries. 



The celiac plexus surrounds the celiac axis, and divides 

 into the gastric, hepatic, and splenic plexuses, which accompany 

 the corresponding vessels. It receives splanchnic branches; 

 on the left side it receives also filaments from the right vagus. 



The gastric plexus receives filaments from the vagi. 



The hepatic plexus receives branches from the left vagus, 

 and sends nerves to the right suprarenal plexus, and forms 

 secondary plexuses, which follow the branches of the hepatic 

 artery. 



The splenic plexus is reinforced from the left semilunar 

 ganglion and the right vagus. 



All the above plexuses run along with the arteries, and sub- 

 divide into secondary plexuses, corresponding to the arterial 

 branches, which form complex communications with one 

 another. The same applies to the following: 



The superior mesenteric plexus is reinforced by a branch 

 from the union of the celiac axis and right vagus. 



The aortic plexus, on the abdominal aorta, is reinforced by 

 filaments from the solar plexus and lumbar ganglia, renal 

 plexuses and semilunar ganglia. It ends in the hypogastric 

 plexus. 



The inferior mesenteric plexus arises from the preceding, 

 and runs on the artery, joining superior mesenteric branches 

 and the pelvic plexus. 



The hypogastric plexus is formed by lateral prolongations 

 from the aortic plexus and lumbar ganglia. It lies between 

 the two common iliac arteries. Below it bifurcates into the 

 two pelvic plexuses. 



