> someone mentioned that if you think of our digestive system as a tube connecting two holes in the body then everything inside of our stomach is external. For

> someone mentioned that if you think of our digestive system as a tube connecting two holes in the body then everything inside of our stomach is external. For what it's worth, I'm pretty sure this was said somewhere in the Chris Kresser, Joe Rogan Experience podcast episode #842.[0] [0] https://www.youtube.com/watch?v=v_2vNj8pshY https://www.youtube.com/watch?v=v_2vNj8pshY