What is Spiracle?
{{no sources|date=November 2024}} [[File:Actias selene 5th instar spiracles sjh.jpg|300px|thumb|A caterpillar, with lines pointing to spiracles]] [[Insect]]s have small holes in their bodies that allow them to breathe. These holes are called '''spiracles'''. Air comes in the spiracles and goes to [[invertebrate trachea]], or tubes. These tubes take the [[oxygen]] to other parts of the insect body. Because insects have no lungs, air comes in and goes out of the spiracles passively (by itself). Some insects can open and close the spiracles to keep water out. Some [[spiders]] also have spiracles. [[Shark]]s and [[ray]]s have a spiracle behind each eye. When the shark is not moving, the spiracle helps the shark to breathe. {{biology-stub}} [[Category:Insects]] [[Category:Animal anatomy]]