For example, teachers used the spirometer (a big machine that you breathe into) to explain aspects of lung function.
You will need to blow into a machine called a spirometer.
Each inhalation is followed by measuring the exhalation capacity with a measuring tool called a spirometer.
The patient places a clip over the nose and breathes through the mouth into a tube connected to a machine called a spirometer.
During the test, the child exhales and the spirometer measures the airflow, comparing lung capacity to the normal range for the child's age and race.