Have you the gut?
If you want to know what goes on there, here is your chance. A human stomach that's human just as it much as it can replicate parts of what the original can do... which is not much, even its inventors say.
But for what it is worth, ladies and gentlemen, presenting unto you the 'not-so-human stomach.' Ta da!
Boy, the underbelly sure is ugly! Nearly as much as it is fascinating.