An arthropod that is an insect is a dragonfly. A dragonfly is an arthropod because it is bilaterally symmetrical. Also, its body is made up in structures. One of the parts of a dragonfly found in all insects is tubes. The tubes are used in order to gain oxygen. In order to go through respiration the dragonfly attracts oxygen through the tubes in order to gain oxygen for the cells within them. In order for there to be the right amount of oxygen it is due to the size of the dragonfly and its tubes. If he dragonfly is larger than other than the tube will be longer helping it to absorb more energy. This is how the arthropod of the dragonfly attains oxygen to breathe.