Even plants breathe the air, you know.
Now, there is a little row of holes or pores along each side of the abdomen of the insect.
These are the breathing pores. No, May, the insects do not breathe through their mouths, they breathe through their sides.
You can see the breathing pores, or spiracles, as they are called, very plainly in many insects.
You can see them on the abdomen of the locust, and in some caterpillars they are bright-colored spots.
There are spiracles on the sides of the thorax, too, but they do not show so plainly as those on the abdomen.
The spiracles open into air tubes that carry air to the blood of the insect.