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 arteriolar 

 recto?. 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. 



