214 



MICROSCOPIC AX ATOMY OF THE 



wax-plate method. In this he found that the afferent vessel 

 breaks up into live branches. These form a network of capil- 

 laries which anastomose in such a manner that three main 

 groups are formed : a median and two lateral groups. Capil- 

 laries from these in leaving the glomerulus form two main 

 branches, which join to make up the efferent vessel. 



FIG. 166. 



Afferent 



and 



efferent 



vessels { Convo- 



j < luted 



/ ( tubules 



Bowman's 

 capsule, 

 outer part 



From a section through the cortex of an ape's kidney. A Malpighian corpuscle, together 

 with the heginning of the urinary canal, is shown. X 350. 



The convoluted tubule of the first order (38-42 ^L in diam- 

 eter) is lined with cubical epithelial cells. Near the capsule of 

 Bowman we find a transition from fiat cells to the cubical type. 

 The protoplasm of the cubical cells is finely granular, and 

 shows in the part of the cell toward the lumen a definitely 

 striated appearance. In the rest of the cell the granules are 

 arranged radially in rows. The borders between the epithelial 

 cells usually cannot be made out (Fig. 167). 



