242 



ELEMENTS OF MAMMALIAN ANATOMY 



with the eight posterior cranial nerves and the first spinal 

 nerve. From the inferior cervical ganglion a branch goes 

 to the vagus nerve, 



several branches to the brachial 



Fig. 117. — Chief Part of Left Half of Sympathetic System Caudad of the 

 Diaphragm. Semidiagrammatic. 

 bl. Bladder; ce, celiac axis; du, duodenum cut ofif; dia, diaphragm; gr, anterior 

 gastric plexus; g, ganglion; im, inferior mesenteric artery; il, external iliac artery; 

 7ig, dorsal branch of vagus (Fig. 106. ax) ; «/, ventral branch of vagus; oe, esopha- 

 gus cut off; p, superior mesenteric plexus; plx, inferior mesenteric plexus; px, 

 branches to dorsal gastric plexus; rn, renal plexus; s?n, superior mesenteric 

 artery; spn, splanchnic major or greater splanchnic nerve from the sympathetic 

 cord; sg, semilunar ganglion; spc, sympathetic cord of left side. 



plexus, and a branch to the heart, forming the cardiac 

 plexus, while the main sympathetic cord continues along the 

 dorsal thoracic wall. A ganglion occurs opposite each verte- 

 bral body, from which it gives off a branch to the corresponding 

 spinal nerve. The great splanchnic arises from the main cord 



