Answer:
the top left answer
Explanation:
In hemodialysis blood is pumped from a patients body into an external machine that acts as an artificial kidney by removing waste like a normal kidney would and it pumps it back in. Peritoneal dialysis in a similar fashion however they pump dialysis into the peritoneum. Both are in a way and external fluid. The wording is a little confusing but jus think of external as foreign or not of the body.
