BLOOD-VESSELS OF THE KIDNEYS. 



411 



Fi-:. 296. 



Fig. 297. 



Fig. 297. — Injected Glome- 



KULUS FROM THE INNER PART 



OP THE Cortical substance 

 OF THE Horse's Kidney. 

 70 diameters (from Kolliker 

 after Eowman). 



a, interlobular artery ; «/, 

 Ctfferent artery ; m, m, convo- 

 luted vessels of the glomerulus ; 

 ef, efferent or straight arteriole ; 

 h, its subdivision in the medul- 

 lary substance. 



Fig. 296.— DiAGR.vM OF the Distkibution op THE Blood-vessels in the Kidney 



(from Ludwig). 



ai, ai, interlobular artery giving off numerous vasct affercntia to tlie glomeruli, g ; the 

 rasa cffcrentia are seen to break up into capillaries amongst the convoluted tubules in the 

 cortical substance, and their blood is collected partly by the venre stellatte or stellulse, v s, 

 near the suface of the kidney, partly by the interlobular veins, vi, vi, which accompany 

 the interlobular arteries. From the lowermost glomeruli some of the vasa efferentia pass 

 down amongst the straight tubules of the medullary substance as the so-called false 

 arterire recta, ar'. The true arteriie recttp, ar, spring directly from the main branches of 

 the renal aixery, or from the interlobular arteries, and run down in bundles, ah, towards 

 the apex of the pyramid, breaking up into capillaries with long meshes. Their blood ia 

 returned to the interlobular veins, vi, by the vense rectte, vr. vp, represents the fine 

 venous plexus around the apices of the pjTamids. 



