120 ZOOLOGY. 



of the ear, as well as from the touch-organs of the skin and 

 sensory nerve-endings in muscles. From all these it obtains 

 information as to the momentary relations of the body with 

 the external world, and is constantly sending out appro- 

 priate orders to the muscles to preserve the equilibrium of 

 the body. 



The bulb is especially the centre for the more complicated 

 reflex actions, such as those concerned with respiration and 

 the circulation. 



