How do most insects respire?
Reviewed by Dalvoy
UPSC Civil Services preparation
- AThrough skin
- BThrough gills
- CBy lungs
- DBy tracheal systemCorrect
Explanation
Insects do not have lungs or use their skin for primary respiration. Instead, they possess a complex network of air-filled tubes called the tracheal system. Air enters this system through small openings on the sides of their bodies called spiracles. These tubes branch out into smaller tracheoles that deliver oxygen directly to the insects tissues and cells. This efficient system allows oxygen to reach internal organs without the need for a blood-based transport system like that found in mammals.
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