How does a dialysis machine work and how does it differ from a kidney transplant machine? This is related to the topic of excretion.
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One of the primary jobs of a kidney is to remove urea and certain salts from the blood so they can exit the body in urine. In a dialysis machine, blood from the patient runs through tubes made of a semi-porous membrane.
A pump in the hemodialysis machine slowly draws out your blood, then sends it through another machine called a dialyzer. This works like a kidney and filters out extra salt, waste, and fluid. Your cleaned blood is sent back into your body through the second needle in your arm.
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