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Inspiratory Reserve Volume (IRV) is the additional amount of air a person can inhale after a normal inspiration.
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Mechanism of Breathing and Respiratory Volumes
Inspiratory Capacity (IC) is the total volume of air a person can inspire after a normal expiration (TV + IRV).
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Mechanism of Breathing and Respiratory Volumes
Functional Residual Capacity (FRC) is the volume of air remaining in the lungs after a normal expiration (ERV + RV).
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Mechanism of Breathing and Respiratory Volumes
Vital capacity (VC) is the maximum volume of air a person can breathe in after a forced expiration (TV + IRV + ERV).
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Mechanism of Breathing and Respiratory Volumes
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