Snake venom?

This may sound like the dumbest question but is snake venom still toxic if you ingest it as opposed to if it's injected into your bloodstream or tissue? Does your digestive system break down the proteins or whatever in it rending it harmless? I know that many predators eat venomous snakes. Do they eat the entire snake or do they instinctively know not to eat the head? I hope I'm putting this in the correct category where people who know these things like to hang out. Please don't call me stupid because I already know that I am.