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).

  • bluGill@fedia.io
    link
    fedilink
    arrow-up
    6
    ·
    7 hours ago

    IN fish water goes in through the mouth and out through the gills, so the connection is required. Some might be able to take water in and out through the gills, but the normal ways is in the mouth out the gills.