Nikolas
Created page with "== Renal circulation == The kidneys receive a lot of blood: 20 – 25% of resting CO. The oxygen extraction is very low, because the abundant circulation isn’t meant to serve oxygen but to be filtered. The tubules are what need the most oxygen in the kidneys. In normal cases does the cortex receive much more blood than the medulla. However, when the RBF is decreased will the ratio be reduced – the cortex will still receive most blood of the two, but the difference..."