In case of any renal failure, we will use a physio-chemical device to remove excretory products from blood.This is known as dialysis.
The dialysing machine or artificial kidney consists of a number of cellophane tubes embedded in a dialysing fluid.Blood from an artery or a vein is allowed to pass through these cellophane tubes. all the waste products from the blood will be absorbed by this fluid. The purified blood is passed back into the vein.