What is the normal amount of FVC expired during FEV? in a healthy adult?

Name: What is the normal amount of FVC expired during FEV? in a healthy adult?
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The FEV₁ is an index of severity in chronic obstructive pulmonary disease (COPD). The ability to work and the likelihood of dying from respiratory disease are statistically correlated with the FEV₁. Normal healthy adults exhale approximately 83% of the FVC in 1 second (FEV?), 94% in 2 seconds (FEV₁), and 97% in 3 seconds (FEV₁).

What Is the Normal Amount of FVC Expired During FEV