734 



NERVOUS SYSTEM. 



The four or five sacral ganglia and the ganglion impar are situated by the inner side 

 of the sacral foramina and in front of the coccyx. These are connected with the ganglia 

 above and with each other, and receive filaments from the sacral nerves, there being 



FIG. 231 (B).Lnmbar and sacral portions o the ^i : tn pathetic. (Sappey.) 



1, section of the diaphragm; 2, lower end of the (esophagus; 3, left half of the stomach; 4, small intestine; 5, sig- 

 moid flexure of the colon; 6, rectum; 7, bladder; 8, prostate; 9, lower end of the left pneumogastric; 10, lower 

 end of the right pneumogastric; 11, solar plexus; 12, lower end of the (treat splanchnic nerve ; 13, lou-er end 

 of the lesser splanchnic nerve; 14, 14, last two thoracic ganglia; 15, li>,thefour lumbar ganglia; 16, 16, 17, 



generally two branches of communication for each ganglion. The filaments of distribu- 

 tion go to all of the pelvic viscera and the blood-vessels. The inferior hypogastric, or 

 pelvic plexus is a continuation of the hypogastric plexus above, and receives a few fila- 

 ments from the sacral ganglia. The most interesting branches from this plexus are the 



