Which of the following structures is used for respiration in insects? by Sunday | Nov 21 | Biology WAEC | 0 comments A. Lungs B. Thorax C. Cuticle D. Spiracles Correct Answer: Option D D. Spiracles Users Also Read These:Which of the following structures would carry out…Which of the following insects transmits swollen…Which of the following pairs are social insects?Define external respiration AND internal respiration…The respiratory structures of insects are?