Lesson 6 of 17
Breathing is not respiration
Show on a big screenWe breathe all day. Is that the same as respiration?
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The idea
No. Breathing and respiration are different things.
Breathing is taking air in and giving it out again. Respiration happens inside the body. Oxygen helps break down glucose, a sugar from food. This releases energy.
| Goes in | Comes out |
|---|---|
| Glucose + oxygen | Carbon dioxide + water + energy |
Respiration makes carbon dioxide. So breathed-out air has more carbon dioxide than breathed-in air. Lime water is a clear liquid made from chuna. It turns milky with carbon dioxide. A teacher can show this.
Step 1 of 3
- Two things happen in a body: breathing and respiration.
- Breathing: air moves in and out at the nose.
- Respiration: energy is released from food, all the time.
Breathing moves air in and out. Respiration uses oxygen to release energy from food.
Try the lab to finish this lesson.