TV-  The tidal volume is the total amount of air inhaled or exhaled during regular  respiration  or relaxed breathing. Approximately 500 ml of air is utilized during normal respiration in a healthy man. IRV-  An inspiratory reserve volume is a supplementary volume, approximately ranging between 2500 to 3100 ml of air which could be effectively inhaled after the inspiration of a standard tidal volume. ERV-  An expiratory reserve volume refers to the additional capacity of air which is about 1200 ml are that could be forcibly exhaled out after the expiration of a standard tidal volume. RV-  The residual volume is about the total volume of air around 1100 ml to 1200 ml residing in the lungs after the reserve volume is emitted or breathed out. By adding up specific lung volumes we can find the values of lung capacities. TLC-  The total lung capacity applies to the total volume of air-filled in the lungs after a forced inspiration. The lung capacity of a healthy man is estimat