The only possible exceptions I can think of are fish(I imagine gills and mouth are not connected but don’t really know). I am excluding bacteria and viruses and I believe they don’t really breath(correct me if I’m wrong).
The only possible exceptions I can think of are fish(I imagine gills and mouth are not connected but don’t really know). I am excluding bacteria and viruses and I believe they don’t really breath(correct me if I’m wrong).
Guinea pigs are obligate nasal breathers. They only breathe through their mouths when in extreme respiratory distress.
They are also absolutely adorable.
That air is still going through the same tube as the food though, regardless of nose or mouth breathing.