Concentration of urine depends upon which organ :

Concentration of urine depends upon which organ :
A Bowman's capsule
B Length of Henle's loop
C P.C.T.
D Network of capillaries arising from glomerulus

Detailed Solution

The loop of Henle, with the vasa recta, creates an increasing osmotic gradient in the medulla by the counter-current mechanism.
The longer the loop of Henle, the steeper the medullary gradient and the more concentrated the urine that can be produced (e.g. desert rodents have very long loops).
So the concentration of urine depends on the length of Henle's loop.

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