The ppt covers the topic Respiration in Aquatic Insects in detail.

1. RESPIRATION IN AQUATIC
INSECTS

2. INTRODUCTION
Aquatic insects obtain oxygen directly from
the air or from that dissolved in the
water.insects that obtained oxygen from
water nearly always remain a tracheal
system so that the oxygen must come out of
solution into the gaseous phase.

13. Cuticular Respiration~
✓ Many aquatic species have a relatively
thin integument that is permeable to
oxygen .
✓Larger insects ,more active ones,or
those living in less oxygenated water may
need to rely on other adaptations to
supplement cuticular respiration.

14. Plastron~
* A plastron is a special array of
rigid,closely spaced hydrophobic hairs
that create an "airspace" next to the
body.
*When the insect consumes oxygen,it
creates a partial pressure deficit inside
the plastron.

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