THE URINARY ORGANS. 



267 



Stellate 



forming what are called arterial arches. The ar- 

 teries form incomplete arches across the base of the 

 pyramid, while the accompanying veins, in this 

 place, form complete -venous arches across the base 

 of the pyramid. From the arches interlobular 

 arteries pass 

 outward be- 

 tween the me- 

 dullary rays 

 and among the 

 convoluted tu- 

 bules, taking a 

 direct course 

 toward the sur- 

 face of the kid- 

 ney. At inter- 

 vals they give 

 off curved short 

 branches which 

 pass directly to 

 the glomerulu? 

 of a Malpig- 

 hian corpuscle, 

 where they 

 break up into 

 a spongy mass 

 o f capillaries. 

 A vein, smaller 

 than the artery, 

 emerges from 

 the glomerulus 

 close to the 

 point where the artery enters. 



Capsule. 



Interlobtdar 

 artery. 



Vas afferent. 

 Vas efferent. 



Arterial arch 

 between the 

 cortex and 

 medulla. 



Pseudo-arleruc 

 recta. 



Fig. 203. Diagram of blood supply of kidney. 



The artery is called 



