Why is it necessary to separate oxygenated and deoxygenated blood in mammals and birds?
What are the components of the transport system in human beings? What are the functions of these components?
How are the lungs designed in human beings to maximise the area for exchange of gases?
What are the different ways in which glucose is oxidised to provide energy in various organisms?
What advantage over an aquatic organism does a terrestrial organism have with regard to obtaining oxygen for respiration?
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