428 



THE UEINAEY SYSTEM 



large terminal tubules, the papillary duets, which pour the urinary 

 x-cretion into the renal calyces. 



Each uriniferous tubule may thus he subdivided into several portions 



Intercalary (dis- ) 

 tal convoluted) > 

 segment ) 



Proximal convo- ] 

 luted segment ) 



Renal capsul 



Vasa arciformia 



Stout, clear por- > 

 tion of loop of ,- 

 Henle \ 



In t erlol/ir ) 

 blood-vessels ) 



Stout, cloudy por- } 

 tion of loop of 

 Henle ) 



Slender, clear'} 

 portion of loop / 

 of Henle ) 



Henle's loop 



Large, straight I 

 collecting tu- / 

 bule \ 



Arched collecting 

 tubule 



Vas afferens Vas efferens 



Glomerulus 



Cortex 



t Straight, collfct- 

 ( ing tubule 



Interlobular vein 

 Interlobular artery 



Arteriola recta 



Outer stripe 



{ Outer zone of 

 ( medulla 



Inner stripe 



5 Inner zone of 

 ( medulla 



Papilla 



FIG. 400. DIAGRAM OF URINIFEROUS TUBULE OF A MAMMAL. (Adapted from 



Peter and Merkel.) 



which differ from each other, not only in their location, but also in the 

 character of their lining epithelium. The successive portions which 

 compose a single uriniferous tubule may be enumerated as follows: 



