SPLANC1 



In their outward course they give off lateral branches; these are the afferent vessels for the 

 renal corpuscles (see page 1221); they enter the capsule, and end in the glomerulus. From 

 each tuft the corresponding efferent vessel arises, and, having made its egress from the capsule 

 near to the point where the afferent vessel enters, breaks up into a number of branches, which 

 form a dense plexus around the adjacent urinary tubes. 





Convoluted tubule 



Glomerulus 



Neck of tubule 



FIG. 1132. Section of cortex of human kidney. 



The second set of branches from the arterial arcades supply the renal pyramids, which they 

 enter at their bases; and, passing straight through their substance to their apices, terminate 

 in the venous plexuses found in that situation. They are called the arterise rectae. The efferent 

 vessels from the glomeruli nearest the medulla break up into leashes of straight vessels (foist 

 arterice rectoe) which pass down into the medulla and join the plexus of vessels there (Fig. 1128). 



Fio. 1133. Transverse section of pyramidal substance of kidney of pig, the bloodvessels of which are injected. 

 o. Large collecting tube, cut across, lined with cylindrical epithelium, b. Branch of collecting tube, cut across, lined 

 with cubical epithelium, c, d. Henle's loops cut across, e. Bloodvessels cut across. D Connective tissue ground 

 substance. 



The renal veins arise from three sources, viz., the veins beneath the fibrous tunic, the plexuses 

 around the convoluted tubules in the cortex, and the plexuses situated at the apices of 

 the renal pyramids. The veins beneath the fibrous tunic (venae stellatae) are stellate in 

 arrangement, and are derived from the capillary net-work, into which the terminal branches of 

 the inter lobular arteries break up. These join to form the interlobular veins, which pass inward 

 between the rays, receive branches from the plexuses around the convoluted tubules, and, having 

 arrived at the bases of the renal pyramids, join with the venae recta, next to be described. 



