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Insect Trachea, 400X
The invertebrate trachea refers to the open respiratory system composed of spiracles, tracheae, andtracheoles that terrestrial arthropods have to transport metabolic gases to and from tissues. In amphibians, the trachea is normally extremely short, and leads directly into the lungs, without clear primary bronchi. Many insects, such as grasshoppers and bees, which actively pump the air sacs in their abdomen, are able to control the flow of air through their body. In some aquatic insects, the tracheae exchange gas through the body wall directly, in the form of a gill, or function essentially as normal, via a plastron.