Lesson 5 ·Class 9 · The Respiratory System · Match Lab
Lung Volumes and Capacities
How much air actually moves.
Match each term to what it measures.
Matched 0/7
Free play — tap an item on the left, then its partner on the right; each link tells you why. Switch to when you're ready to test yourself.
Residual volume is the one you can never measure by breathing out — which is precisely why it is not part of vital capacity.
What this lesson covers
Challenges to clear
- Match every term.
- Connect the air you can never breathe out to its name.
The task
Match each term to what it measures.
What this lesson covers
- Tidal volume — The air breathed in or out in one quiet breath — about 500 ml (Most of your breathing is only this much.)
- Inspiratory reserve volume — The extra air you can take in after a normal breath in (Roughly 2500–3000 ml held in reserve.)
- Expiratory reserve volume — The extra air you can force out after a normal breath out (About 1000–1100 ml.)
- Residual volume — Air that always remains in the lungs and can never be breathed out (About 1200 ml — it stops the alveoli collapsing.)
- Vital capacity — The greatest volume that can be breathed out after the deepest breath in (Tidal + inspiratory reserve + expiratory reserve. A key measure of lung health.)
- Total lung capacity — Vital capacity plus the residual volume (Everything the lungs can hold, about 5–6 litres.)
- Dead space air — Air filling the airways that never reaches the alveoli (It takes no part in gas exchange — which is why shallow rapid breathing is inefficient.)
Hint
Residual volume is the one you can never measure by breathing out — which is precisely why it is not part of vital capacity.