to explain what makes our lungs so good at getting oxygen into the blood
DESCRIPTION
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. - PowerPoint PPT PresentationTRANSCRIPT
1
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
What makes
lungs so good at taking in oxygen?
Explore
Elicit 5discuss
Oxygen diffuses through lung tissue to get to your blood.
We can model that with something you can see.
Explore 6 SS1 - 4
Use the model to compare a hollow lung with one full of air spaces.
Explore 7 SS1 - 4
And what does that tell us about diffusion in lung tissue?
Explore 8
What did the model show you?
discuss
So alveoli give lungs a huge surface area for gas
exchange…
Explain 9
...and their walls are
really thin and surrounded by blood vessels.
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
These delicate tissues have to be protected from dirt and
germs.
Extend 11
Extend 12
Mucus protects them.
The more we understand about mucus the more we can help athletes like Wayne.
Extend 13