In medicine,<unk>  may refer to: *<unk> , air remaining in the lungs after a maximal exhalation; see lung volumes *<unk> , urine remaining in the bladder after voiding; see urinary retention
Residual volume
Intrapleural pressure
Lung allocation score
Ventilatory threshold
Tidal volume
Lung compliance
End-systolic volume
Diffusing capacity