The respiratory organ found in the cockroach is the? by Sunday | Jun 27 | Biology WAEC | 0 comments A. air sac B. trachea C. lung book D. lung E. gill Correct Answer: Option B – trachea Users Also Read These:In birds, loss of appetite, respiratory difficulties…In grasshopper/cockroach digestion starts from the?In the mammalian respiratory system; exchange of…List FOUR characteristics of respiratory surfaces. -…The respiratory structures of insects are?