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Boojho’s uncle was hospitalised and put on dialysis after a severe infection in both of his kidneys.
 
1. What is dialysis?
 
2. When does it become necessary to take such a treatment?
Answer variants:
Completely damaged kidneys are treated by removing poisonous chemicals from the circulation. Dialysis machine is artificial kidney.
Dialysis is needed if the kidneys are healthy.
Completely damaged kidneys are treated by removing poisonous chemicals from the circulation. Dialysis machine is natural kidney.
Dialysis is needed if an illness or accident damages a kidney.