@literally45-- I'm not an expert but I believe that all insects breathe through their skin. They have very small openings in the skin, sort of like valves, that can open and close. The air is taken in to a series of tubes. Then the oxygen is delivered to the cells much like in humans.
It's always interesting to learn about respiration in animals and other creatures. There are so many different types of respiratory organs out there.
A funny one is a turtle's, well eat least some turtle's, that can breathe in water through the rear end. Some say buttocks, but turtles don't really have buttocks. Some turtles that live in water have a pouch in back that allow them to absorb oxygen from the water, much fish do with their gills. It's strange and fascinating at the same time.