<unk>  (symbol<unk>  or<unk>  is the volume of air moved into or out of the lungs during a normal breath. In a healthy, young human adult,<unk>  is approximately 500 ml per inspiration or 7 ml/kg of body mass.
Tidal volume
Peak inspiratory pressure
Ventilatory threshold
Peak expiratory flow
Lung compliance
Lung volumes
Alveolar pressure
Intrapleural pressure