To keep his ten pints of 

blood

clean, his 

kidneys

yielded around two liters of

urine

each day. He had a friend who's kidneys weren't working like once were. She was on the transplant recipient list, but it had been a year now, and there was no clarity on how much longer the wait would last.

His friend had to go to a kidney center for eight hours a day. Some times he would skip a day, but he went nearly every day. He asked his friend why it took so long? 

"Damn if I know," he'd get as a reply.

He did wonder why 

dialysis

took so long. He never looked into it, but he thought it had something to do with the fact that you couldn't just take all the blood out of the body at once. You had to take a little bit out, clean it, and then return it. In that process, you would never be able to take out purely dirty blood make it clean and return it. Instead you would continuously be working with blood that had some ratio of clean and dirty blood.

He thought about his life. The good. And the bad. Days never had a clear feeling tied to it. Weeks passed and there'd be the good and the bad. In different amounts. So was life.