STRUCTURE OF THE KIDNEY 



169 



Blood-vessels. The artery of the kidney divides into branches 

 on entering the organ, and these branches pass towards the cortex, 

 forming incomplete arches between the cortex and the medulla (fig. 

 206, a). The branches of the renal vein form similar but more com- 

 plete arches (g). From the arterial arches vessels pass through the 



/_...... . 



FIG. 200. VASCULAR SUPPLY OP KIDNEY. (Cadiat.) 



n, part of arterial arch ; 6, interlobular artery ; c, glomerulus ; rf, efferent vessel passing to 

 medulla as false art. rect. ; e, capillaries of cortex ; /, capillaries of medulla ; g, venous 

 arch ; ft, straight veins of medulla ; j, vena stellula ; i, interlobular vein. 



cortex (interlobular arteries, b], and give off at intervals small arteri- 

 oles (efferent vessels of the glomeruli), each of which enters the dilated 

 commencement of a uriniferous tubule, within which it forms a 

 glomerulus. From the glomerulus a somewhat smaller efferent vessel 

 passes out. and this at once again breaks up into capillaries, which 



