CH. XXXVIII.] 



THE KIDNEY TUBULES 



569 



Blood-vessels of Kidney. The renal artery enters the kidney 

 at the hilus, and divides into branches that pass towards the cortex, 



then turn over and form in- 

 complete arches in the region 

 between cortex and medulla. 

 From these arches vessels pass 



to the surface which are called 

 the interldbular arteries; they 



give off vessels at right angles, 



FIG. 375. Diagram showing the relation 

 of the Malpighian body to the urin- 

 iferous ducts and blood-vessels. 

 , One of the interlobular arteries ; 

 a', afferent artery passing into the 

 glomerulus ; c, capsule of the Mal- 

 pighian body, forming the com- 

 mencement of and continuous with 

 the uriniferous tube; e','.e', -efferent 

 vessels which subdivide and form a 

 plexus, p, surrounding the tube, and 

 finally terminate in the branch of 

 the renal vein e. (After Bowman.) 



which are the afferent vessels of 

 the glomeruli ; a glomerulus is 

 made up of capillaries as pre- 

 viously stated. From each a 

 smaller vessel (the efferent vessel 

 of the glomerulus) passes out, and 



like a portal V6SSel On a Small 



i v i 



Scale, DreaKS Up OnC6 more into 



capillaries which ramify between 

 the convoluted tubules. These 

 unite to form veins (interldbular 

 veins) which accompany the interlobular arteries ; they pass to venous 

 arches, parallel to, but more complete than, the corresponding arterial 

 arches ; they ultimately unite to form the renal vein that leaves the 

 hilus. These veins receive also others which have a stellate arrange- 

 ment near the capsule (vence stellulce). 



Pin. 374. -Vascular supply of kidney, a, Part of 

 arterial arch ; b, interlobular artery ; c, glo- 

 merulus; d, efferent vessel passing to the 



inter - 



