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.
During inhalation, air is taken into the lungs, where oxygen is bonded to your blood cells, and carried to your heart, where it is distributed throughout the body. Exhalation, is where the carbon dioxide that is your body's waste, is deposited into the lungs from the blood cells, and breathed out of your body.