Overview Lung Volumes Lung Volumes Lung volumes are measured by spirometry Tidal Volume (TV) login to view 2 more bullets Inspiratory Reserve Volume (IRV) login to view 2 more bullets Expiratory Reserve Volume (ERV) login to view 2 more bullets Residual Volume (RV) login to view 3 more bullets Lung Capacities a lung capacity includes ≥ 2 lung volumes Inspiratory Capacity (IC) login to view 2 more bullets Functional Residual Capacity (FRC) login to view 4 more bullets Vital Capacity (VC) login to view 3 more bullets Total Lung Capacity (TLC) login to view 2 more bullets Pulmonary Vascular Resistance Lowest at FRC login to view 1 more bullet Contributions from both the intraalveolar vessels (bigger influence) and extraalveolar vessels Increased by login to view 4 more bullets