ABDOMEN. 



271 



tion of the solar plexus, called aortic plexus ; (3) ganglia situated at the origin 

 of every artery from the aorta, which take the name of the aorta ; (4) branches 

 or plexuses from the ganglia, which take also the name of the artery and accom- 

 pany the same to its distribution. 



In view of the foregoing, you are prepared now to find, locate, explain, and 

 understand : 



1. Diaphragmatic artery, nerves, plexus, ganglion, and vein. 



2. Splenic artery, nerves, plexus, ganglion, and vein. 



3. Hepatic artery, nerves, plexus, ganglion, and vein. 



4. Gastric artery, nerves, plexus, ganglion, and vein. 



5. Suprarenal artery, nerves, plexus, ganglion, and vein. 



6. Renal artery, nerves, plexus, ganglion, and vein. 



7. Spermatic artery, nerves, plexus, ganglion, and vein. 



8. Ovarian artery, nerves, plexus, ganglion, and vein. 



9. Superior mesenteric artery, nerves, plexus, ganglion, and vein. 

 10. Inferior mesenteric artery, nerves, plexus, ganglion, and vein. 

 Dissection of the above nerves requires care. Work in the direction of the 



Aorta 



SOLAR PLEXUS, THE ABDOMINAL 

 CLEARING-HOUSE FOR THE 

 SYMPATHETIC NERVE 



c artery, large 

 SYMPATHETIC NERVE, CALLED MESENTERIC 



A MESENTERIC GANGLION ON THE AORTA 



FIG. 1 88. To SHOW RELATION OF ABDOMINAL SYMPATHETIC NERVES TO (i) SOLAR PLEXUS 



AND (2\ TO THE GANGLION AT THE R()OT OF THE ARTERY. 



vessel, with forceps. Consult the figures heretofore given to find name and 

 location of vessels. For solar and aortic plexuses see figure 186. 



Make special note : (i) The renal veins lie in front of their arteries, thereby 

 forming an exception to the rule governing the relation of arteries to veins. (2) 

 The left spermatic vein opens into the left renal vein, and this latter passes in front 

 of the aorta. (3) The right spermatic vein opens into the ascending vena cava just 

 below the renal. (4) The ovarian veins follow the course of their homologues. 

 (5) The spermatic arteries arise from the aorta below the renals, pass in front of 

 the ureter about opposite the bifurcation of the aorta. The ovarian take the 

 same course. (6) The four lumbar arteries are analogous to the intercostals. 

 (7) The ureteric arteries accompany the ureters ; they are branches of the common 

 iliac and superior vesicle. (8) The arteries to the vas deferens, to the urachus, and to 

 the ureter are branches of the superior vesicle. (9) The sacra media, the smallest. 



Essential Points on the Sympathetic. You have traced out the branches 

 of the abdominal aorta, and I trust you now understand the principle under- 

 lying the distribution of visceral nerve-branches, from one abdominal prevertebral 

 plexus the solar plexus. We shall find in the pelvis, likewise, organs receiving 

 arteries ; these arteries will be accompanied by sympathetic nerves ; these nerves 



