THE LRIXARV SYSTEM 



333 



glomerulus. Each group of glomerular capillaries arising from a 

 single arteriole is separated from its neighbors by a rather larger 

 amount of connective tissue than that which separates the individual 

 capillaries. This gives to the glomerulus its lobular appearance. 

 From the smaller glomerular capillaries the blood passes into some- 



A B C 



Fig. 230. — Diagram to Illustrate (left) the Course of the Uriniferous Tubule; (right) 

 the Course of the Renal Vessels. (Szymonowicz.) A, B, C, D, each represents a kidney 

 lobule limited laterally by the interlobular vessels; a, afferent vessel; e, efferent vessel 

 of glomerulus; I, Bowman's capsule; 2, first convoluted tubule; 3, descending arm of 

 Henle's loop; 4, ascending arm of Henle's loop; 5, second convoluted tubule; 6 and 7, 

 collecting tubules; 8, duct of BeUini; b, interlobular artery; c, interlobular vein; d, renal 

 arch (arcuate artery above and arcuate vein below); in their transverse course these 

 vessels he along the boundary line between cortex and medulla; /, interlobar vein; 

 g, interlobar artery; h, medulla; i, medullary ray;y, cortex. 



what larger capillaries, which unite to form the efferent vessel of the 

 glomerulus. As afferent and efferent vessels lie side by side, the 

 glomerulus has the appearance of being suspended from this point 

 (Figs. 223,225). The entire vascular system of the glomerulus is arterial. 



