2l6 



ELEMENTS OF BIOLOGY 



CEREBRUM 



CEREBELLUM 



SYMPATHETIC NERVE 



MEDULLA OBLONGATA 



SPINAL CORD 



^^COMMUNICATING RAMUS 



SPINAL NERVE 



SYMPATHETIC GANGLION 



Fig. 146. — The relative positions of the central and sympathetic nervous systems 

 in the human body. The distance between the two systems has been somewhat 

 exaggerated in order that their forms might be more distinctly shown. 



