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Question
State the
volume of air remaining in the lungs after a normal breathing.
State the volume of air remaining in the lungs after a normal breathing.
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Solution
The volume
of air remaining in the lungs after a normal expiration is known as
functional residual capacity (FRC). It includes expiratory reserve
volume (ERV) and residual volume (RV). ERV is the maximum volume of
air that can be exhaled after a normal expiration. It is about 1000
mL to 1500 mL. RV is the volume of air remaining in the lungs after
maximum expiration. It is about 1100 mL to 1500 mL.
∴FRC
= ERV + RV
≅ 1500 + 1500
≅ 3000 mL
Functional
residual capacity of the human lungs is about 2500 – 3000 mL.
The volume of air remaining in the lungs after a normal expiration is known as functional residual capacity (FRC). It includes expiratory reserve volume (ERV) and residual volume (RV). ERV is the maximum volume of air that can be exhaled after a normal expiration. It is about 1000 mL to 1500 mL. RV is the volume of air remaining in the lungs after maximum expiration. It is about 1100 mL to 1500 mL.
∴FRC = ERV + RV
≅ 1500 + 1500
≅ 3000 mL
Functional residual capacity of the human lungs is about 2500 – 3000 mL.
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