Countercurrent exchange in the renal medulla.
Cowley
A W
AW
Roman
R R
RR
D000818:Animals; D001692:Biological Transport; D007679:Kidney Medulla / Q000033:anatomy & histology / Q000098:blood supply / Q000378:metabolism*; D008833:Microcirculation; D012079:Renal Circulation; D014867:Water / Q000378:metabolism
D014867:Water