The abdomen
When you do that, you block the breathing pores or holes.
Center that regulates breathing are lying mostly in the thoracic ganglia. Insects perform respiratory movements whit muscles of abdomen, in which are trachea.
dolphins
trachea is the breathing of insects
Both the nymph and adult mantis (and many other insects) breathe through very tiny holes in the abdomen called 'spiracles'. If your vision is good, you can observe the insect breathing through the holes by watching the abdomen closely.
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Hai
Roses leaves have holes due to insect feeding, disease, or environmental stress.
they breath out of their eye holes
Slugs, snails, and black vine weevils may be putting holes in your hosta.
trying to zero in on an insect
those are the corals breathing hole 1 for breathing 1 for eating 1 for disposing watse. also they have those holes for other animals to hide in.