The Loop of Heanley and the Counter Current Mechanism

This is probably the best written description, with pictures that i have seen of how counter current exchange works. And these are the pictures i think i have gone to intuitively, without ever knowing were from this book. But i agree, there's a lot of detail leading up to the part where you get to that really pretty part, and then true false. I was able to easily sort important verses not important, in terms of beng able to go through the detail.