How Does a Dialysis Machine Work to Filter the Blood

How does a dialysis machine work to filter the blood when the kidneys fail?

A) It uses osmosis and diffusion between the blood and a fluid specially formulated to suit the patient to correct their water and salt balance.
B) It pumps the blood through a filter specially designed to suit the patient to correct their water and salt balance.
C) It prevents air bubbles from forming as blood pumped external to the body for "cleaning."
D) It removes metabolic wastes from the blood, but it cannot adjust water.
E) It uses active transport to artificially filter the blood.
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