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GCSE Physical Education · key term
The volume of air breathed in or out in one normal breath.
Used by AQA and OCR
Paper 1
Revise: Spirometer trace interpretationTidal volume is the amount breathed in or out in one normal breath. On this trace, it is the vertical distance from a normal expiration trough to the next inspiration peak. It is not the total amount of air in the lungs at the peak.
Paper 1
The volume of air breathed in or out in one normal breath, measured in ml or L.
Revise: Respiratory System Structure and FunctionTidal volume is the volume of air breathed in or out in one normal breath. Minute ventilation is the total volume of air breathed in or out in one minute.
The volume of air breathed in or out in one normal breath, usually measured in litres.
The volume of air breathed in or out in one breath.
Measure tidal volume as the vertical difference between a normal breath's peak and trough, not the peak's height above zero.
For minute ventilation, include units. If tidal volume is in ml, divide the final answer by 1000 to convert ml/min to L/min.
Keep heart rate separate from stroke volume, and respiratory rate separate from tidal volume. Rate describes frequency; volume describes an amount.
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