214 



NORMAL HISTOLOGY. 



cross the bases of the pyramids and become tributary to the large intralobar 

 trunks. The blood within the cortical capillaries escapes by three paths: 

 ( i ) through small veins that pass from the outer third of the cortex towards 

 the capsule, beneath which they empty into stems running parallel to the 



Glomerulus of 

 Malpighian body 



Interlobular artery 



Interlobular vein 



Vasae rectae of 

 medulla 



Stellate vein 



Capillary network 

 in labyrinth 



Capillary network 

 in medullary ray 



Large blood- 

 vessels at junction 

 of cortex and 

 medulla 



FIG. 266. Longitudinal section of injected kidney of dog, showing general arrangement of blood-vessels 

 of cortex and adjoining medulla. X 40. 



free surface of the kidney; from three to five of these horizontal vessels con- 

 verge to form a star-like channel, the vena stellata, which is the beginning of 

 the interlobular vein that passes through the cortex with the corresponding 

 arteriole to the arcuate veins at the base of the pyramid; (2) through 

 small veins that empty directly into the interlobular veins at various levels; 



