If urine wasn't filtered in the kidney, the particles in the urine would cause your genitals to explode.
You get sick because urine is in the blood before it is filtered out.
Blood is filtered by the kidneys.
The renal vein would have the cleanest blood because the kidney would have filtered out the poisons so the blood is clean. Arterial blood has foreign substances in it.
Waste and excess water is filtered out and sent to the bladder as urine.
There shouldn't be any harmful bacteria in your blood but if there were it would most likely be filtered out into the lymph and then destroyed by phagocytosis in the lymphnodes. As for RBC's over approx. 120 days old, they are filtered out in the kidneys.
blood
all the components of blood get to the kidney to be filtered..however: red blood cells, and platelets are the only parts of blood that are not filtered. there have been cases of glucose being filtered (inn diabetics). Things filtered include, plasma (water), urine, salts, protein and foreign bodies!
Blood gets filtered because of the Nephrons, which are tiny little blood capillaries inside the kidneys.
The kidneys
The kidney does not get filtered. It does the filtering of the blood that passes through it. It removes impurities from the blood, and filters these impurities to the urinary bladder. The filtered blood is sent back into the body to be recirculated. And the impurities are expelled from the body in the urine.
the kidney filter blood
serum
Blood is filtered there.