Your Amazing Body

How Your Lungs Breathe 🌬️

Right now, without even thinking about it, you are breathing in and out. Let's find out how your lungs do this clever job!

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Try this: Put one hand on your chest and take a slow, deep breath in… then let it out.

Did you feel your chest get bigger, then smaller? That's your lungs at work — about 20,000 times a day!

Tap Next to follow a breath of air on its journey inside you. ➡️

Where does the air go?

Air doesn't go straight to your lungs — it travels down a path. Tap each glowing part to see what it does!

👃 pipe lungs

Tip: the blue and pink parts are tappable.

👃 Nose & mouth: air comes in here. Tiny hairs and sticky stuff catch dust so cleaner air goes down.
🫁 Windpipe (trachea): a bendy tube that carries the air down into your chest.
🩷 Lungs: two soft, spongy bags that fill up with air. This is the main stop!
You've found 0 of 3 parts.

The secret muscle 💪

Lungs can't squeeze themselves! A flat muscle under them — the diaphragm — does the pulling. Press the button and watch.

diaphragm

Resting…

When the diaphragm pulls down and flattens, the lungs have room to puff up — that's breathing in. When it relaxes up, air pushes out.

In with the good, out with the waste ♻️

Inside the lungs your blood does a swap. It grabs oxygen (good!) and drops off carbon dioxide (waste). Tap each gas to send it the right way.

🟢 Oxygen 🟠 Carbon dioxide 🟢 Fresh air 🟠 Used-up gas

⬇️ Breathe IN (into the body)

⬆️ Breathe OUT (waste leaves)

Tap a gas bubble above to sort it. Oxygen goes IN, carbon dioxide goes OUT.

Millions of tiny balloons 🎈

Why are lungs so spongy? Inside, they hold about 500 million teeny air sacs called alveoli. The swap happens on their thin walls.

If you spread them all out flat, they'd cover almost a whole tennis court! 🎾

That huge surface lets you grab lots of oxygen with every breath.

Why do we puff after running? 🏃

Your muscles burn oxygen to make energy. Move fast, and they shout for more — so you breathe quicker!

Quick think: When does your body need to breathe the fastest?

Pick the one where your muscles work the hardest.

You did it! 🎉

Now you know the whole journey of a breath:

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Take one more deep, slow breath — and thank your amazing lungs. Great learning today!