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Breathing and Exchange of Gases — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYBreathing and Exchange of Gases1 Mark
Question
Why is respiration insect called direct?
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Answer

The insects have network of tubes (tracheal system). The cells of the tracheal system exchange $O _2 / CO _2$ directly with the air by the spiracles present in insect's body.

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