Answer:
To filter out waste from the blood
Explanation:
Is this physiology? So the kidney does not filiter solid watse. It does not clean the blood, and it doesn't make you pee. Your urine is full of waste or full of suger, soldium, or other materials. However your blood is invole in the urinary system and the kidney does filter out waste. So the best answer is "to filter out waste from the blood"
