388 



PRACTICAL ANATOMY. 



FIG. 169. BLOOD-VESSELS AND URINIFEROUS TUBULES OF THE KIDNEY. 



A, capillaries of the cortex : B, of the medullary ; a, interlobular artery ; 1, vas afferens ; 

 2, vas efferens ; r, e, vasa recta : c, vense rectae ; v, v, interlobular vein ; S, origin of a vena 

 at ell at a ; i, i. Bowman's capsule and glomerulus ; x, x, convoluted tubules ; t, t, Heule's loop ; 

 n, n, junctional piece ; o, o, collecting tubes ; O, excretory tube. 



number of curved branches called the collecting tubes ; 

 these become much twisted, convoluted, and form the con- 

 voluted tubes of Ferrein, a name applied to all the tubuli 



