Gas exchange is impaired. Blood oxygenation no longer occurs. Metabolic waste builds up in the blood. Nutrients are no longer transported to organs.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: What occurs if the body's renal system fails to work?
Possibilities:
- Gas exchange is impaired.
- Blood oxygenation no longer occurs.
- Metabolic waste builds up in the blood.
- Nutrients are no longer transported to organs.

Metabolic waste builds up in the blood.