Compare and contrast a kidney and an oil filter?

I just need some key points for similarities and non-similarities...compare and contrast, thanksCompare and contrast a kidney and an oil filter?
The kidney filters the blood and releases the contaminates in the form of urine while the oil filter filters the oil and then allows it to return to the engine. Hope this helpsCompare and contrast a kidney and an oil filter?
Compare


One filters oil.


One filters poison or toxins.


Contrast


One is metal.


One is living.