184 



GENERAL ZOOLOGY 



leading to a motor neuron, passing in turn to the effector. 

 Actually at least one or more intermediate neurons, between the 



Oculomotor nerve 



midbrain 



medulla 



ciliary 4. 



■pheno palatine g. 



b maxillary g. 



bmaxillary. 

 blingual glands. 



t-iZsmall intestine 

 '.adrenal 



' large intestine 



'■ kidney bladder 

 reproductive organs 



Fig. 118. — Diagram showing relations between central nervous system and 

 autonomic nervous system. Postganglionic fibers of sympathetic system are 

 represented by broken lines; those of the parasympathetic system by dotted 

 lines. The short broken lines passing to the left of the chain ganglia represent 

 postganglionic fibers passing to sweat glands and to arrector pili muscles. (After 

 Meyer and Gottlieb.) 



principal afferent and efferent neurons, are involved as well. 

 An example of a simple type of reflex action is the knee jerk. 



