Gas exchange in insects takes place across the epithelium of the tracheae (a system of tubes).The tracheal system connects to the outside air by openings called spiracles.Muscles just inside each spiracle can control the opening to minimize water loss.What would happen if the muscles inside each spiracle were unable to function?

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If the muscles inside each spiracle were unable to function, the spiracles would remain open, causing increased water loss through transpiration. This would lead to an increase in water consumption in the insect to compensate for the loss and maintain homeostasis.

Gas Exchange in Insects Takes Place Across the Epithelium of the Tracheae