Internal medicine

The branch of medicine called "internal medicine" is kinda funny isn't it? I mean let's say we ask a doctor, "Are you a surgeon?" and she says, "No, I practice internal medicine."

Oh, so surgeons don't work internally? They can't be working *externally.* Well I suppose with a laser some surgeries are possible like that, but what are they practicing when they have their hands in someone's guts? Can you really get any more internal than that???