Final answer:
In insects, gas exchange occurs through spiracles, which are connected to a network of tubes called tracheae that deliver oxygen directly to tissues, making it the most efficient respiratory system for these organisms. The correct answer to the question is c) spiracles; tracheae.
Step-by-step explanation:
Through openings called spiracles, which link to an internal network of tubes called tracheae, insects exchange gasses. These tubes are crucial for the insect respiratory system as they carry oxygen directly to tissues throughout the body, bypassing their circulatory system. The blood in insects does not transport oxygen as it does in humans. The tracheal system is made of chitin and is highly specialized and efficient in active animals. It directly performs gas exchange between the air and cells within the organism by allowing oxygen to pass into the body through the spiracles and regulating the diffusion of CO₂ and water vapor.
Given the options:
- a) None of the answer options is correct
- b) tracheae, spiracles
- c) spiracles; tracheae
- d) radulae; tracheae
- e) spiracles; radulae
The correct answer is: c) spiracles; tracheae.