To explain what makes our lungs so good at getting oxygen into the blood
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To explain what makes our lungs so good at getting oxygen into the blood. WILFs:. Wayne’s legs need lots of energy during a race. So his lungs take air in fast!. Engage. 3. And get the oxygen into his blood ... 20 times as fast as usual!. Engage. 4. discuss.

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Presentation Transcript

Wilfs
WILFs: into the blood


Wayne’s legs need lots of energy during a race. into the blood

So his lungs take

air in fast!

Engage

3


And get the oxygen into his blood into the blood

...20 timesas fast as usual!

Engage

4


discuss into the blood

What makes lungs so good at

taking in oxygen?

Explore

Elicit


Oxygen diffuses through lung tissue to get to your blood. into the blood

We can model that with something you can see.

Explore

SS1 - 4


Use the model to into the blood compare a hollow lung with one full of air spaces.

Explore

SS1 - 4


discuss into the blood

What did the model show you?

And what does that tell us about diffusion in lung tissue?

Explore


So alveoli give lungs a huge surface area for gas exchange…

...and their walls are really thin and surrounded by blood vessels.

Explain

9


So alveoli give lungs a huge surface area for gas exchange…

...which lets gases diffuse much faster between the air spaces and your blood.

Explain



Mucus protects them. germs.

Extend

12



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