Mon Prof Augmenté
Air sacs and blood tubes
Age 10 · Science
Tiny balloon-like air sacs sit inside your lungs, wrapped in thin blood tubes. Oxygen slips out of the air sacs into the blood, and carbon dioxide slips the other way, out of the blood into the air sacs.
This picture is part of the full library
Every lesson is open to everyone for 7 days after it is published. This one came out on September 24, 2026: its text stays readable here, and its picture opens with a subscription.
The app is free. A subscription opens every lesson, in every school year.
Age 10: open this week
Browse Age 10
In the picture
- Air sac wall: the thin surface that oxygen crosses
- Blood tube along the sac: the channel that carries blood past the air
- Blue dot entering the tube: oxygen leaving the air sac
- Grey dot entering the sac: carbon dioxide leaving the blood
Examples
- Air slowly escaping a balloon through its skin
- Fizz rising out of a fizzy drink
Key takeaways
- Oxygen goes from the air sacs into the blood, and carbon dioxide goes from the blood into the air sacs.
- The walls of the air sacs and blood tubes are very thin, so gases can pass through them.
Quiz: Air sacs and blood tubes (Age 10)
-
Which gas moves from the air sacs into the blood?
-
Which gas moves from the blood into the air sacs?
-
Why can gases pass between the air sacs and the blood?
The answers, each with its explanation, are in the app. This lesson has left the free week, so its quiz is part of the subscription.
Free app, optional subscription
App Store Google Play
Carry on in the app
At least one new illustrated lesson every weekday for your child’s year, with its quiz and a reminder at 6:15 pm.
Your child’s teacher does not use My Enhanced Teacher yet?
Tell them about it
