Breathing in and out
Oxygen in, carbon dioxide out.
Hold your breath
Hold your breath for a few seconds. You soon want to breathe again.
What do we take in when we breathe in?
What this lesson covers
The idea
Breathing is the process of inhaling and exhaling air, which takes in oxygen and releases carbon dioxide.
Hold your breath
Hold your breath for a few seconds. You soon want to breathe again.
What do we take in when we breathe in?
- Oxygen from the air
- Only dust
- Only water
Inhale and exhale
Press Inhale. Then press Exhale.
In and out
Breathing in brings oxygen in. Breathing out sends carbon dioxide out. Without food we can live for about a week, but without breathing we usually cannot live more than a few minutes.
Breathing is the process of inhaling and exhaling air, which takes in oxygen and releases carbon dioxide.
Notes
Breathing is the process of inhaling and exhaling air, which takes in oxygen and releases carbon dioxide.
Check yourself
Breathing in is called …
Which gas do we take in when we breathe in?
Which gas is released when we breathe out?
For how long can we usually live without breathing?
- inhaling — correct. Yes!
- exhaling. Exhaling is breathing out.
- swallowing. Swallowing moves food down the food pipe.
- Only carbon dioxide. We release carbon dioxide when we breathe out. We take in oxygen.
- Oxygen — correct. Yes!
- Dust. Dust is trapped by hair and mucus in the nose. We take in oxygen.
- Oxygen. Oxygen is what we take in when we breathe in.
- Starch. Starch is a food component, not a gas.
- Carbon dioxide — correct. Yes!
- Not more than a few minutes — correct. Yes!
- A week. We can live about a week without food, but not without breathing.
- A day or two. That is about how long we can live without water. Without breathing it is only a few minutes.