CHAPTER VII 



VEINS, LYMPHATICS, ARTERIES, AND NERVES AND 

 THEIR RELATIONS, LEFT SUPERIOR LIMB 



The student will endeavor to preserve arteries, veins, and 

 nerves at the expense of the muscles in the work in this and 

 Chapter VIII. However, the muscles, especially Nos. isod 

 inclusive, must be dissected out and preserved to such a degree 

 that they are readily recognized, for the anatomy and functions 

 of these muscles cannot be mastered until knowledge of their 

 blood supply and innervation has been added to that of their 

 morphology and general relations. At this time it is quite 

 possible and often necessary, to transect the muscles which 

 have been dissected out in the other limb in unusual places and 

 in more than one place without mutilating them beyond recogni- 

 tion and without injuring their principal vessels and nerves. 



Since, for the most part, the veins parallel the arteries and 

 usually take the same name as the corresponding artery, only 

 the exceptions will be studied in any detail. Thus most of 

 the work of Chapters VII and VIII will be to trace the arteries 

 and nerves in order to determine the structures which they 

 supply. It often happens that students dissect out the arteries, 

 and even other structures, with no more purpose in mind than a 

 pick-and-shovel man has while he is digging up a pipe Hne on the 

 campus. He does not know or care whether the pipe line con- 

 ducts gas, water, steam, oil, air, or soil, or whether removing 

 it will inconvenience anyone or not, and if it does, why and how. 

 Since the function of the arteries is to conduct material neces- 

 sary for the proper function and even Hfe, of the structures, 

 the student should learn their relations to the structures 

 and organs which they subserve. The veins have as important 

 functions to perform as do the arteries, for they convey the 



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