Insects breathe through a network of tubes called tracheae, which open to the outside through small, paired openings called spiracles. Oxygen enters through the spiracles, travels through the tracheae, and is delivered to the cells, while carbon dioxide is transported back out through the same system.
Insects breathe through?
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Question context
This question is part of 🔬 General Science within the broader 🌐 Current Affairs & GK subject and appears in the PPSC Punjab Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.