##### Question

In: Anatomy and Physiology

# discuss the respiratory system lung volume and capacities

discuss the respiratory system lung volume and capacities

## Solutions

##### Expert Solution

Tidal volume

• Amount of air inhaled or exhaled after normal breath .
• Normal volume = 500 mL.

Inspiratory reserve volume

• Amount air inhaled forcefully after a normal inhalation .
• Normal volume = 3000 mL

Expiratory reserve volume

• Amount of air exhaled forcefully after a forcefull exhalation.
• Normal volume = 1000 mL

Residual volume

• Amount of air remaining in the lungs after a forcefull exhalation.
• Normal volume = 1200 mL

Inspiratory capacity

• Amount of air that can be inhaled after normal exhalation
• IC = IRV + TV
• Normal volume = 3500 mL

Vital capacity

• Amount of maximum air that can be exhaled after a forceful inhalation.
• VC= TV + IRV + ERV
• Normal volume = 3400 -4500 mL

Functional residual capacity

• Volume of air in the lungs after normal exhalation.
• FRC = RV +ERV
• Normal volume = 2200 mL

Total lung capacity

• Volume of air present in the lungs after forceful inhalation
• TLC = TV+IRV+ERV+RV
• Normal volume = 4900 - 6400 mL

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