Question

The main muscles controlling the function of trachae of insects are

• A. Alary
• B. Tergo-stermal
• C. Both A and B
• D. None of the above

Answer 1

The correct option is B Tergo-stermal

The respiratory system of arthropods starts with the tracheae whose main function is to deliver oxygen to the body tissues. The air enters the tracheae through the spiracles present on the exoskeletons. Further, these spiracles also control water loss from the body of insects. The valves controlled by muscles is responsible for the opening and closing of spiracles. These spiracles are abdominal appendages which are controlled by the tergosternal muscles.

Thus, the correct answer is option B.