The condescending hit a nerve, but i'm cool now. I created a thread about the heart being a closed system and would like your explanation if you don't mind? I'll grab a link... http://www.sciforums.com/threads/is-the-heart-a-closed-system.143867/
The Golden Rule could be to make sure you clean the toilet before having a No.2...funnily, the crap will never cease to exist in one form or the other either.