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 following insects undergo incomplete…Define external respiration AND internal respiration…Which of the following structures is not involved in…Which of the following is NOT characteristic of…In which of the following insects is group instinct…