DISSECTION OF THE ABDOMEN. 347 



capsule — forming the stellate veins. The interlobular veins join venous 

 arches situated between the boundary layer and the cortex, and from 

 these arise the larger branches that finally unite to form the large renal 

 vein at the hilus. 



The medulla is less vascular than the cortex. Springing from the 

 arterial arches in the outer part of the boundary layer are branches 

 that break up into pencils of long straight arterioles — the arteriolce 

 rectae. These pass through the boundary layer to reach the medulla, 

 in which they run with a rectilinear course between the straight tubules, 

 and break up into a wide-meshed capillary network around and between 

 these tubules. Veins having a straight course like the arteries run in 

 company with them, and join the venous arches in the outer part of the 

 boundary layer. 



Connective-tissue of the Kidney. — This exists very sparingly between 

 the tubes in the cortex, but more abundantly in the medulla. 



[Table. 



