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:The respiratory structures of insects are?Which of the following structures is associated with…In which of the following insects is group instinct…Which of the following is NOT characteristic of…Which of the following pairs are social insects?