170 



ANATOMY OF THE DOMESTIC FOWL 



itself. It receives its blood supply from small branches of the 

 renal artery and is made up of a cortical or peripheral portion which 

 contains the glomerules (Fig. 52, A) and a medullary portion, 

 which is made up of tubules, or urinary canals, arteries, veins, and 

 nerves. 



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The urinary canals are divided into two kinds, namely, the outer 

 and the inner tubular systems. The outer canals, called the tubulm 

 uriniferi corticalis, are very small in caUber and are located in the 



