Where the blood is purified in our body

Question

where theblood gets purified? in lungs or in the heart?

Answer 1

Neither.  In the kidneys. And liver.

Answer 2

It's mainly on the kidneys

When the blood pass through the kidneys, tiny filters called nephrons purify the blood biomechanically by passing excess water and salt waste which will exit the body through urine

^^

Answer 3

liver isnt it?, lungs oxygenate, and heart pumps... liver removes the impurities and toxins (as in the case of drugs and alcohol...)

Answer 4

I think the lymph nodes filter (and purify) the blood?