Glomeruli and Tubules of the Kidney accompanying Activity. 601 



Convoluted tubules — 



Proximal. External diameter ... 39-2 394 



Lumen 6'6 14-0 



Distal. External diameter ... 22-8 28-2 



Lumen 12-6 18*4 



grm. 



Weight of L. kidney 13-5 



„ E. kidney 15 '5 



This experiment shows quite clearly the great effect of obstruction upon 

 the distension of the capsule and accumulation of fluid within the capsule. 

 Obstruction also causes a distinct further dilatation of the distal convoluted 

 tubule, and an increase in the lumina of both parts of the tubule. 



VI. Comparison of a Free Decapsalated Kidney with an Obstructed Kidney. 

 Expt. 7. — E. kidney decapsulated. L. kidney obstructed. 



E. L. 



Glomeruli and capsules — 



Equatorial diameter 121-2 130-4 



Polar diameter 102-0 111-2 



Space 9-8 20*0 



Hence 



Mean diameter capsule 111*6 120-8 



glomerulus 101*8 100-8 



Approximate volume capsule ... 174 220 



„ „ glomerulus 132 128 



fluid 42 92 



Convoluted tubules — 



Proximal. External diameter ... 42*0 41*4 



Lumen 15*4 17*6 



Distal. External diameter ... 28 - 6 31*0 



Lumen 20-4 21*2 



grm. 



Weight of E. kidney 10*7 



L. kidney 11*0 



The results of the measurements in this experiment show that obstruction 

 of the ureter results in an increased expansion of the capsule of the 

 obstructed, as compared to that of the free active kidney ; this is entirely 

 due to a greater accumulation of fluid within it. The convoluted tubules 



