THE SYMPATHETIC. 333 



anterior sacral foramina, and converge as they meet to 

 join in the terminal ganglion, or ganglion Impar. They 

 send numerous branches to the pelvic vessels and viscera, 

 and form secondary plexuses such as the superior hypo- 

 gastric, placed between the iliac arteries anterior to the 

 sacrum. The inferior hypogastric plexus is imbedded in 

 the substance of the perineum, and sends branches to the 

 rectum, prostate, bladder, and corpora cavernosa in the 

 male, or the clitoris, vagina, and uterus in the female. 



In the heart, uterus, kidney, intestines, and other 

 organs there are numerous sympathetic ganglia distrib- 

 uted through the substance of the viscera. About the 

 heart there are three well-defined plexuses which com- 

 municate with the cervical sympathetic ganglia through 

 the cardiac nerves. They are also intimately connected 

 with the pneumogastrics and spinal nerves. 



