ANATOMY OF THE NERVOUS SYSTEM. 



159 



brandies of a nerve-trunk contain fibres which it does not 

 possess as it leaves the centre to which it is connected. 



FIG. 69. Diagram illustrating the general arrangement of the nervous system. 



Nerve-Centres. The great majority of the nerves take 

 their origin from the brain and spinal cord, which together 

 form the great cerebro-spinal centre. Some, however, com- 



