Answer:
Haemodialysis This
method is a boon for thousands of uremic (accusations of urea in blood)
patients all over the world.
Haemodialysing unit
act an on artificial kidney by. removing urea from patients blood due to kidney
failure. In this process blood is drained from artery an pumped into a
dialysing unit after the addition of an anticoagulant like heparin.
The unit
contains a coiled cellophane tube surrounded by a dialysing-fluid having the
same composition as that of plasma except nitrogenous waste. The porous
cellophane membrane of the tube allows the passage of molecules based on
concentration gradient.
Due to the
absence of nitrogenous wastes in dialysing fluid these substances freely move
out, thereby clearing the blood.
In the end
the cleared blood is pumped back to the body through a vein after the addition
of anti-heparin to it thereby completing the process.
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