224 



THE EEASON WHY. 



' AU flesh is not the same flesh : but there is one kind of flesh of men, another 

 flesh of beasts, another of fishes, and another of birds." COBJN THIANS xvi. 



942. What is the consti- 

 tution of a muscle ? 



Every muscle is made up of 

 a number of parallel fleshy 

 fibres, or threads, which are 

 bound together by a smooth 

 and soft tissue, forming 1 a 

 sheath or case to the muscle, 

 and enabling it to glide freely 

 over the surfaces upon which 

 it moves. 



A. Lowef extremity of the muscle 

 which draws the fore-arm towards 

 the upper-arm, bends tho elbow, 

 raises the hand to the head, and is 

 powerfully exerted in pulling, lift- 

 ing, &c. 



C. A muscle which gives off four 

 long tendons, which pass under tho 

 ligaments of the wrist, one to each 

 finger, and by which the fingers are 

 bent upon the palm of the hand, as 

 in grasping, &c. 



F. Tendon of a muscle which 

 draws the little finger and the thumb 

 towards each other. 



The ligaments may be seen enfold- 

 the finger-joints, and also crossing 

 the wrist, underneath the tendons. 



Fig. 57. H-LTTSTEATION OP THH 

 BBLATION OF MUSCLES, TENDONS, 

 AND BONES. 



The muscles are compressed into tendinous cords at their ends, 

 by which they are united to the bones. 



They are arranged in pairs, having reciprocal actions each 

 muscle having a companion muscle by which the part which it 

 moves is restored to its original position, when the influence of the 

 first muscle is withdrawn, and the stimulus given to bring back the 

 part. 



943. Why can we raise our fingers ? 



Because muscles which. He on the fore-arm, and have thei 



