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    A fish out of water dies of lack of oxygen, even though air contains more oxygen than water does. suggest why gills cannot obtain enough oxygen from air
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    (Original post by imaan2121)
    A fish out of water dies of lack of oxygen, even though air contains more oxygen than water does. suggest why gills cannot obtain enough oxygen from air
    What's the main physical difference between air and water? (Think about trying to swim in air)
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    Think about the gas exchange medium of fish, the advantage of it and then, why it wouldn't actually work in air.
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    (Original post by Yusufff)
    Think about the gas exchange medium of fish, the advantage of it and then, why it wouldn't actually work in air.
    I know that gills have an increased surface area due to lamellae, a short diffusion distance, but still not sure
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    (Original post by imaan2121)
    I know that gills have an increased surface area due to lamellae, a short diffusion distance, but still not sure
    What's different about the physical properties of the new medium?
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    Think about the benefits of counter-current flow.
 
 
 
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