What is the relation between ANSI and ISO regarding ISO 27000?

So in one answer I was told that ANSI is a governing body (the only one in the world) for ISO 27000? I think I got something wrong, because I don't see ANSI mentioned anywhere when I read about standards (not that I'm looking for that intentionaly). It's ISO everywhere! Can someone please try to explain me the difference between the two? Does ANSI actually have anything to do with ISO 27000?