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biology a level gas exchange fish

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
Reply 1
Avatar for h3rmit
h3rmit
15
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)
Reply 2
Avatar for Yusufff
Yusufff
10
Think about the gas exchange medium of fish, the advantage of it and then, why it wouldn't actually work in air.
Reply 3
Avatar for imaan2121
imaan2121
OP
9
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
Reply 4
Avatar for h3rmit
h3rmit
15
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?
(edited 7 years ago)
Reply 5
Avatar for Parabrad
Parabrad
9
Think about the benefits of counter-current flow.

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