Lung Volumes & CapacitiesATI TEAS 7 cheat sheet

What each measurement means

8 key facts 5 practice questions Reviewed Oct 2026

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Volumes

Tidal volume — a normal quiet breath, about 500 mL
Inspiratory reserve — extra you can breathe in
Expiratory reserve — extra you can push out
Residual volume — always remains, cannot be exhaled

Capacities

Vital capacity — the most you can exhale after the deepest breath
Total lung capacity — vital capacity plus residual

Clinical

Obstructive disease traps air and raises residual volume

Measured By

Spirometry

Key takeaway

What each measurement means

Before you read

Test yourself first: 5 questions

Question 1 of 5

Which body cavity contains the heart and lungs?

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