The whole purpose of the kidneys is to filter the blood. 99% of that 200 liters gets reabs or back into the body and we only pout 1%. So our urine output per days around about two liters. Toxic metabolites build up in the blood you get sick and you die. You answered it um adequately How many marks would I get for uh Out of 10 a 10 a 10 mark short answer question 1 1.75. That's a fail. In my eyes you're a failure.