About Lesson
Introduction to Gaseous Exchange
Gaseous exchange is the passing of respiratory gases across a respiratory surface.
Gases get into cells from the surrounding environment and out of the cells by simple diffusion.
Importance of Gaseous Exchange
- Avails O2 to cells for respiration and eliminates CO2 from the respiring cells.
- Plants absorb CO2 for photosynthesis
- Ensures a balance in concentration O2 and CO2 in the atmosphere.
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