260 



PHYSIOLOGY AND HEALTH. 



from a horse or a carriage, are apt to throw their arms out to 

 save themselves ; the weight of the body comes upon the 



FIG. XLVIII. Ligaments of the, Wrist and Hand. 



a, a, Bones of the fore-arm. 



b, b, b, Bones of the hand. 



c, c, c, Ligaments of the wrist. 



d, d, Ligaments of the hand. 



hand, and, of course, upon the arm and shoulder ; the force 

 of the blow presses the bone backward, and sometimes 

 thrusts the head over the edge of the socket. 



CHAPTER V. 



Muscles. Motive Power. Number. Arrangement. Action. 

 Description and Use. On Front of the Body. On Back. On 

 Side. 



615. THE bones are merely the framework. They are the 

 rigid parts upon which the action is made, but they have no 

 active power. All the motive power is in the muscles. These 

 perform all the motions in the animal body. 



