Trachea (Insects) - GCSE Biology Definition

The trachea in insects is part of their gas exchange system. It is a network of tiny tubes that runs throughout their bodies, allowing air to reach every cell directly. The trachea connects to the outside through small openings on the insect’s body called spiracles. Air enters through these spiracles, travels down the trachea, and delivers oxygen directly to their tissues. This system ensures that insects get the oxygen they need and helps remove carbon dioxide, which is a waste product. This direct method of gas exchange is different from how humans breathe and allows insects to survive in a variety of environments.