52 THE MUSCLES 



The Upper Limb 



Del'toid, raises the arm. 



Te'res ma'jor, lowers the arm. 



Sub- S cap-u-la'ris,) rotateth 



Spi-na'tus, 



Bi'ceps, bends forearm. 



Tri'ceps, straightens forearm. 



Pro-na'tor, j rotate forearm> 



Su-pi-na tor, ) 



Flex'or car'pi ra-di-a'lis, 1 



Flex'or car'pi ul-na'ris, I moye the hand 



Ex-ten'sor car'pi ra-di-a'lis, [ 



Ex-ten'sor car'pi ul-na'ris, J 



More than thirty muscles take part in moving the fingers. 



The Lower Limb 

 Il-i'a-cus, 



Pso'as mag'nus, 



Pet' , Y move the thigh forwards. 



Ad-duc'tor, 



^ll", 8 ',, i move the thigh 



Sar-to'ri-us (from Sar'tor, a tailor), crosses one thigh over the other. 

 Vas'tus' ! m Ve the leg forwards - 



GracTlis ! m Ve the leg backwards - 

 Tib-i-a'lis, 1 



*, -ve the foot. 

 So-le'us, 



Twenty muscles take part in moving the toes. 



QUESTIONS FOR TOPICAL REVIEW 



PAGE 



1. What can you state of the number and division of the muscles ? 33 



2. Describe the structure of the muscles 33, 34 



3. Their arrangement in pairs and consequent action 34 



4. What is the difference between the motion called flexion and that 



called extension ? 34. 



5. Describe their action, and state which are the more powerful 34 



6. What is the difference between voluntary and involuntary muscles ? 34 



7. Illustrate the difference between the two 34 



8. State all you can of the tendons or sinews 35, 36 



9. What is meant by contraction of the muscles ? 36 



10. In how many and what ways may contraction be effected ? 36 



11. What is stated of after-death contraction ? 36, 37 



12. Why cannot a muscle in life continue contracted a long time ? 37 



13. How then can the constant beating of the heart be explained ? 37, 38 



14. How does the strength of a man compare with that of a horse ? 38 



15. What can you state in regard to the relative strength of animals ?. . 38 



