GENERAL ARRANGEMENT OF THE SYMPATHETIC SYSTEM. 637 



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FIG. 834. Lumbar and sacral portions of the sympathetic (Sappey). 



1, section of the diaphragm ; 2, lower end of the oesophagus ; 3, left half of the stomach ; 4, small 

 intestine ; 5, sigmoid flexure of the colon ; 6, rectum ; 7, bladder ; 8, prostate ; 9, lower end of the 

 left pneumogastric ; 10, lower end of the right prieumogastric ; 11, solar plexus ; 12, lower end of 

 the great splanchnic nerve ; 13, lower end of the lesser splanchnic nerve ; 14, 14, last two tho- 

 racic ganglia ; 15, 15, the four lumbar ganglia ; 16, 16, 17, 17, branches from the lumbar ganglia ; 18, 

 superior mesenteric plexus ; 19, 21. 28, 23, aortic lumbar plexus; 20. inferior mesenteric plexus ; 

 24. 24, sacral portion of the sympathetic ; 25, 25, 26, 26, 27. 27, hypogastric plexus ; 28, 29, 30, tenth, 

 eleventh and twelfth dorsal nerves ; 31, 32, 33, 34, 35, 36, 37, 38, 39, lumbar and sacral nerves. 



Cranial Ganglia. The ophthalmic, lenticular, or ciliary ganglion is sit- 

 uated deeply in the orbit, is of a reddish color and about the size of a pin's- 

 head. It receives a motor branch from the third pair and sensory filaments 

 from the nasal branch of the ophthalmic division of the fifth. It is also 

 connected with the cavernous plexus and with Meckel's ganglion. Its so- 

 called motor' and sensory roots from the third and the fifth pair have already 

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