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.
I've seen tidal volume defined as either the volume of air inhaled ***and*** exhaled during a breath or the volume of air inhaled ***or*** exhaled during a breath.. Which is it? One inhales a volume of air, say Vi, and one exhales a volume of air, say Ve. Practically speaking,... show more I've seen tidal volume defined as either the volume of air inhaled ***and*** exhaled during a breath or the volume of air inhaled ***or*** exhaled during a breath..