Answer the following question given this paragraph: 

Respiration that occurs without lungs. Insects have a system of internal tubes and sacs that oxygen travels through to reach body tissues. Air is taken in through the spiracles , openings on the sides of the abdomen.


Q: On insects, what are the openings on the sides of the abdomen that allows respiration to occur?

 Choices:

- gills

- wings

- chloroplasts

- spiracles

A:
spiracles
