And how to know if you need one! While it gets lost easily in the noise of the WIC, the truth is that the wedding is the ceremony, and the reception is the party that happens after the wedding. In a similar way, the rehearsal dinner has become a big deal in the American Wedding Machine, and the rehearsal itself is often an afterthought.
Residual volume (RV) is a lung volume representing the amount of air left in the lungs after a forced exhalation; this volume cannot be measured, only calculated.
The air in the lung is divided into four compartments: tidal vol-. umeâair exhaled during quiet breathing; inspiratory reserve vol-. umeâmaximal air inhaled above tidal volume; expiratory reserve. volumeâmaximum air exhaled below tidal volume; and residual. volumeâair remaining in the lung after maximal exhalation. The.