470 



STRUCTURE OF THE KIDNEY. 



itself passes off. By breaking up into numerous capillary loops the vascular tuft 

 or glomerulus is formed within the interior of the capsule. The glomerulus is 

 provided toward the wall of the capsule with a covering of flat, nucleated cells 



FIG. 142. Structure of the Kidneys: i, the vessels and urinary tubules in semi-schematic arrangement; A, cortical 

 capillaries; B, medullary capillaries; a, interlobular artery; i, afferent vessel; 2, efferent vessel; r e, straight 

 arterioles; c, straight venules; v v, interlobular veins; S, origin of a stellate vein; i i, capsule enclosing a 

 glomerulus; x x, convoluted tubule; t t, Henle's loops; n n, intercalated portion; o, collecting tubules; 

 O, excretory duct; II, capsule and glomerulus: a, afferent vessel; e, efferent vessel; c, capillary network of 

 the cortex; k, endothelioid structure of the capsule; h, origin of the convoluted tubule; III, rod-cells from 

 the convoluted tubules; 2, viewed from the side (g, internal area containing the nuclei); i, viewed from the 

 surface; IV, cellular lining of Henle's loop; V cells in collecting tubule; VI, section of the excretory duct. 



(Fig. 142, II), which are present also between the capillary loops of the tuft. 

 From the loops there passes, from the center of the tuft, the efferent vessel (2), 

 which is always of smaller size and makes its exit from the capsule close by 



