The primary organ used in the filtration of blood in the body is the kidney.
The kidney is a bean shaped organ that is about the size of a human fist. It is located at the bottom of the rib cage. There are two kidneys in the body, each kidney is located at each side of the spine in the body.
The kidney filters unwanted substances from the blood and pass them out of the body as urine. Blood is filtered in a part of the body known as glomerulus.
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