<prompt> Residual volume is the volume of air in lung after-Maximal inspirationMaximal expirationNormal inspirationNormal expiration  <response>: Ans. is b i.e., Maximal expirationo Residual volume is the volume of air that remains in the lungs after maximal expiration.Respiratory Volumes and Capacities for an Average Young Adult MaleMeasurementTypical valueDefinition Respiratory volumes1.Tida volume TV500 mlAmount of air inhaled or exhaled in one breath during relaxed, quiet breathing2.Inspiratory reserve volume IRV3000 mlAmount of air in excess of tidal inspiration that can be inhaled with maximum effort3.Expiratory reserve volume ERV1200 mlAmount of air in excess of tidal expiration that can be exhaled with maximum effort4.Residual volume RV1200 mlAmount of air remaining in the lungs after maximum expiration, keeps alveoli inflated between breaths and mixes with fresh air on next inspirationRespiratory Capacities5.Vital capacity VC4700 mlAmount of air that can be exhaled with maximum effort after maximum inspiration ERV-rTV-s-IRV; used to assess strength of thoracic muscles as well as pulmonary function6.Inspiratory capacity 1C3500 mlMaximum amount of air that can be inhaled after a normal tidal expiration TV IRV7.Functional residual capacity FRC2400 mlAmount of air remaining in the lungs after a normal tidal expiration RV ERV8.Total lung capacity TLC5900 mlMaximum amount of air the lungs can contain RV - VC 