HEALTH AND WELI^-BEING 



33 



of body. State the relation of physical vigor (a) to an in- 

 sufficient supply of nourishing food; (6) to poor digestion; 

 (c) to imperfect assimilation; (d) to lack of pure air, suffi- 

 cient sleep, and suitable exercise. 



5. In what one organ of the body are largely centered 

 the activities upon which the mental processes depend ? In 



FIG. 17. Recreation at school. 



general how much does its development depend upon mus- 

 cular prowess? Muscular exercises and physical training 

 should be directed chiefly to what ends? What is the argu- 

 ment for school athletics (a) where all pupils have opportu- 

 nity to engage in them ; (6) where but a few are trained whose 



