Gas exchange in insects

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5 Terms

1
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Spiracles

valves where CO2 leaves and O2 enter via diffusion in an insect

2
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Trachea

Tubes which lead off from the spiracles and branch off into tracheoles

3
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Tracheoles

have thin walls and are branched meaning oxygen diffuses directly into respiring cells

insect circulatory system does not carry oxygen

4
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how insects move air in and out of the spiracles

by pumping their abdominal

5
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Purpose of spiracles valves closing

reduces water loss