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).
Bacteria and fungi do respirate but they don’t necessarily have organelles. So depends on how you use the term “breath”. I think viruses mostly rely on the host cell’s preexisting homeostasis.