Zoology - Breathing and Exchange of Gases Question with Solution | TestHub

Functional Residual Capacity (FRC) is the volume of air which remains in the lungs after a normal expiration. It is the sum of Expiratory Reserve Volume (ERV) and Residual Volume (RV) i.e.$\mathbf{F}\mathbf{R}\mathbf{C}=\mathbf{E}\mathbf{R}\mathbf{V}+\mathbf{R}\mathbf{V}$.

$\mathrm{T}\mathrm{V}+\mathrm{I}\mathrm{R}\mathrm{V}=\mathrm{I}\mathrm{C}$(Inspiratory Capacity)

$\mathrm{V}\mathrm{C}+\mathrm{R}\mathrm{V}=\mathrm{T}\mathrm{L}\mathrm{C}$(Total Lung Capacity)

$\mathrm{T}\mathrm{V}+\mathrm{I}\mathrm{R}\mathrm{V}+\mathrm{E}\mathrm{R}\mathrm{V}=\mathrm{V}\mathrm{C}$(Vital Capacity)