Chap, v.] NUTRITION. 657 



tion of contractions or the generation of heat, but bears on the 

 whole nutrition of the muscle. Similar considerations lead us 

 also to conclude that the influence of the nervous system bears 

 on the whole nutrition of the glands, of the blood vessels, of the 

 skin and the connective tissues in general, in fact of nearly the 

 whole body. 



42 



