NERVOUS SYSTEM. 87 



Q. Where is this median anastomosis seen ? 



Ji. In the superficial nerves of the neck and chin. 



Q. What feature in paralysis does this median anasto- 

 mosis explain ? 



Jl. Probably some mobility in a part which is affected 

 with paralysis. 



Q. What systems are destitute of nerves? 



#. The cartilaginous, the fibre-cartilaginous, the pi- 

 lous, the epidermoid, and others, are unprovided with 

 nerves. 



Q. What peculiarity is found in the terminations of the 

 optic, olfactory, and auditory nerves ? 



Jl. The pulp of these nerves is expanded on the organs 

 without the covering of the nerve. 



I 

 Organization of the Nervous System ofJlnimal Life, 



Q. What is the organization of the nerves of animal 

 life? 



A. Filaments in apposition form chords, and chords in 

 apposition form trunks of nerves. 



Q. Is the internal organization of the nerves uniform? 



#. It is not it is singularly diversified. 



Q. What is the organization of each nervous filament ? 



*ft. An external membrane forming a canal; containing 

 the medullary matter or pulp. 



Q. What is the nature and origin of the nervous coat? 



t#. It is the pia mater of the brain and spinal marrow. 



Q. What are the three great modifications of the pia 

 mater ? 



/?. On the gray substance surrounding the brain and 

 cerebellum it is red, highly vascular, loose, and easily se- 



