THE HIGHER ORGANISMS 



153 



ment of the central system in which the information they 

 bring from the external world is received and utilized. 

 The brain of the higher animals receives impulses 



Fio. 57. Scheme of reflex nervous action. Relationship of cells and fibres 

 of brain and spinal cord* 



which express themselves as sensations known as touch, 

 pain, temperature, scent, taste, sight, and hearing. 

 From the organs in which these impressions originate 



