Which organ in the excretory system filters blood?

The bean-shaped kidneys filter waste products out of the bloodstream and dispose of them by creating urine.

Explanation:

Kidneys

Explanation:

They will filter the blood by removing waste and too much unnecessary water they can remove the water by creating urine.

Hope this Helps

i think it's the first one because doctors aren't the ones who get rid of the old needles. most of them time it's not even doctors who give you shots, it's nurses.