Write a short note on respiratory capacities.

Explanation

Vital capacity (VC) the maximum volume of air that can be moved out during a single breath following a maximal inspiration . A person first inspires maximally then expires maximally. VC = ERV + TV + IRV
Inspiratory capacity (IC) The total volume of air a person can inhale after normal expiration . It includes tidal volume and inspiratory reserve volume. IC = TV + IRV
Expiratory capacity (EC) The total volume of air a person can exhale after normal inspiration . It includes tidal volume and expiratory reserve volume . EC = TV + ERV
Total Lung capacity (TLC) The total volume of air which the lungs can accommodate after forced inspiration is called Total Lung Capacity . This includes the vital capacity and the residual volume . It is approximately 6000 mL . TLC = VC + RV
Minute Respiratory Volume The amount of air that moves into the respiratory passage per minute is called minute respiratory volume .