Which of the following structures is associated with respiration in insects? by Sunday | Jun 23 | Biology WAEC | 0 comments A. Air sac B. Spiracle C. Lung D. Alveolus E. Gill Correct Answer: Option B – Spiracle Users Also Read These:Which of the following is NOT characteristic of…Which of the following structures would carry out…The following insects undergo incomplete…Define external respiration AND internal respiration…The respiratory structures of insects are?