sorry cant answer
Insects do
Through their lungs
Frogs
I think so
Since only Arthropoda have spiracles that would mean that the only sea creatures that breath through them would be CRUSTACEANS
A tadpole can breath through their gills but they grow lungs as they turn into a frog.
fish and certain marine life
Water. Stick. Insect
a wellwires
Saltwater animals have adaptations such as special glands to excrete excess salt, streamlined bodies for efficient swimming, and camouflage to avoid predators. Some animals have symbiotic relationships with other species to help them survive in the harsh saltwater environment. Ultimately, these adaptations help saltwater animals thrive in their ocean habitats.
without nitrogen our bodys would over oxygenate (get to much oxygen). nitrogen is important for plants, after all they breath in nitrogen and breath out oxygen.
Whales breath through their backs but I don't know one that breathes through their back sides
liver