Question

how can we live without a kidney?

Answer 1

$\bold{\huge{\boxed{HEY MATE }}}$

yes, we can live without kidney as medical science make it possible...
by the hemodialysis (artificial kidney).
In case ofkidney failure, an artificial kidney can be used. An artificial kidney(Hemodialysis) is a device to remove nitrogenous waste products from the blood through dialysis.
This is similar to the function of the kidney , but it is different since there is no reabsorption involved.

HOPE IT HELPS.... ✌✌