because the blood has wastets that the excretory system gets its waste from. The kidney filters the blood and sends the dirty blood to thebladder (which is excreted as Urine) and the clean blood goes...
you got your blood vein and you got your mud vein
they are both systems in the human body
the circulatory system distributes oxygenated blood all over your body, which your organs need. The excretory system i dno
It will not work because if the heart, which is part of the circulatory system, has an infection the kidneys cannot work properly.