The function of lungs can be measured using a spirometer.
Tidal volume
- A spirometer can measure the tidal volume in lungs.
- The tidal volume is the volume of air in a normal breath at rest.
- A typical tidal volume is about 0.4-0.5dm³.
Ventilation rate
- Spirometers can also measure the ventilation rate.
- The ventilation rate is the number of breaths someone can take per minute (when at rest).
- The average ventilation rate is around 15 breaths per minute.
Vital capacity
- A spirometer can measure vital capacity.
- The vital capacity is the maximum volume of air that can be breathed in or out of the lungs.
- It is essentially the lung capacity.
We've learnt about 3 things a spirometer can measure. Lets consolidate this knowledge before learning about a few more things a spirometer can measure.