Gas Exchange

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Essential Questions: 

How do plants and animals take in the gases they need, and expel their waste gases?

How do respiratory surfaces increase in complexity with increasing size of animals? Why is this necessary?

How does the change in gas exchange system anatomy across vertebrate phyla reflect the evolutionary move from water to land (and back again)?


Review and extension of study of leaf anatomy (introduced in Science I).

Comparison of gas exchange mechanisms in various invertebrate and vertebrate phyla

Review and extension of gas exchange in humans (introduced in Science II)


Skills and Processes: 

Building on previous knowledge as developmentally appropriate (increasing complexity of understanding)



End of unit test