To explain what makes our lungs so good at getting oxygen into the blood
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Transcript of To explain what makes our lungs so good at getting oxygen into the blood
![Page 1: To explain what makes our lungs so good at getting oxygen into the blood](https://reader031.fdocuments.us/reader031/viewer/2022013011/56812dc2550346895d9305a8/html5/thumbnails/1.jpg)
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To explain what makes our lungs so good at getting oxygen into the blood
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WILFs:
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Wayne’s legs need lots of energy during a race.
So his lungs take air in fast!
Engage 3
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And get the oxygen into his blood
...20 times as fast as usual!
Engage 4
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What makes
lungs so good at taking in oxygen?
Explore
Elicit 5discuss
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Oxygen diffuses through lung tissue to get to your blood.
We can model that with something you can see.
Explore 6 SS1 - 4
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Use the model to compare a hollow lung with one full of air spaces.
Explore 7 SS1 - 4
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And what does that tell us about diffusion in lung tissue?
Explore 8
What did the model show you?
discuss
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So alveoli give lungs a huge surface area for gas
exchange…
Explain 9
...and their walls are
really thin and surrounded by blood vessels.
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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 10
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These delicate tissues have to be protected from dirt and
germs.
Extend 11
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Extend 12
Mucus protects them.
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The more we understand about mucus the more we can help athletes like Wayne.
Extend 13