424 



ANATOMY IX A NUTSHELL. 



which is situated below and behind the arch of the aorta. For convenience it is 

 ■divided into two parts, the superficial and d< ep. It is formed by all the cardiac 

 branches and the cardiac branches of the pneumogastric nerve. The three 

 cardiac branches conic from the three cervical ganglia, the superior from the 

 superior one. and the middle from the middle one. and the inferior one from the 

 inferior cervical ganglion. These unite with the pneumogastric nerve and form 

 the cardiac plexuses. The superficial cardiac plexus is made by the left 

 superior cervical cardiac and the left inferior cervical cardiac from the pneu- 

 mogastric, plus fibers from the deep plexus. The superficial cardiac plexus gives 

 off brandies to the right coronary plexus and the left pulmonary plexus. The 

 deep cardiac plexus consists of left portion and right portion. The left por- 



PLATE CCXXVII. 



DENTINF 



PULP 

 CAVITY 



m m 



X I * J ■ ■ y r ■ \ i 



A Verticle Section of a Canine Tooth. 



tion gives off branches to the left coronary plexus and the left auricle. The 

 right part gives off branches both to the right and left pulmonary plexuses 

 and tlir righl auricle. 



Thus we see that the cardiac plexus is made by sympathetic nerves plus 

 somatic uerve, and the somatic nerve is the tenth. 



LESSON (XXIV. 



Tin ><>lar plexus has three uames, SOLAR, EPIGASTRIC, ABDOMINAL BRAIN. 



It i< situated around the coeliac axis. It is formed by the three splanchnic 

 nerves from each side and the semilunar ganglia and the right pneumogastric 

 uerve, and occasionally the left. It gives off branches to the following arteries 

 ami these subdivisions take the nami s of the arteries which they surround. 



