THE NERVES. 429 



The nn. splanchnici are white, the plexus, into which they enter 

 gray. 



680. b. Plexuses in the abdomen. 



I. Plexus Solaris (cozliaci s. mesenterici) comprehends the great 

 plexus of nerves on the aorta, from the origin of art. caliaca and 

 mesaraica super, as far as the commencement of the renal arteries, 

 lying behind the peritoneum, deeply, behind the regio epigastrica, 

 and forming very large ganglia, from which numerous branches, 

 interlacing with each other, pass off, and which anastomose with 

 n. vagus, phrenicus, with other branches of the sympathicus, a 

 less number with the lumbar nerves. The principal mass of them 

 forms the two : 



1. Ganglia semilunaria (s. magna cceliaca s. cerebrum abdo- 

 minak), two reddish, bridge-like masses of ganglion, which are 

 situated on the inner sides of the supra-renal capsules. 



Into these ganglia the white nn. splanchnici major and minor 

 betake themselves ; from them gray branches pass out, as : 



1. Rami phrenici, uniting with posterior branches of n.phreni- 

 cus and forming plexus about the artt. phrenicce inferr. on 

 the right and left, entering into the fleshy portion of the 

 diaphragm, and connecting themselves with the hepatic and 

 suprarenal plexus. 



2. Rami suprarenaks (eight to sixteen) form, particularly 

 upon the posterior surface of the suprarenal capsules, plexus 

 suprarenaks, which are connected with n. phrenicus, vagus, 

 and with the renal plexus. 



3. Rami hepatici, arise from the two large ganglia and that 

 part of the pkxus Solaris which lies transversely over the 

 art. hepatica before the aorta ; and forms : 



a. Pkxus arteriosus hepaticus s. dexter, on the hepatic 

 artery and ductus hepaticus within the liver ; where it 

 anastomoses with the 



b. Pkxus venosus. From this plexuses go to the gall 

 bladder (also from a), ductus cysticus, and choledochus, 

 which are in connexion with those of the pancreas, 

 duodenum, and stomach. 



4. Rami gastrici (white) form, especially upon the art. 

 coronar.ventric. sinistra, a plexus (plex.curvatur. minor.), 

 anastomoses with the branches of n. vagus (which see) 

 lying before it, pancreatic, splenic, and hepatic plexuses ; 

 forming a coronet around the port, pylorica. 



5. Rami lienaks, forming the pkx. lienalis on the splenic 



