General Biology I

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Lung volumes

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General Biology I

Definition

Volume of air associated with different phases of the respiratory cycle. Lung volumes are critical for assessing lung function and diagnosing respiratory conditions.

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5 Must Know Facts For Your Next Test

  1. Tidal Volume (TV) is the amount of air inhaled or exhaled during normal breathing.
  2. Inspiratory Reserve Volume (IRV) is the additional air that can be inhaled after a normal inhalation.
  3. Expiratory Reserve Volume (ERV) is the additional air that can be exhaled after a normal exhalation.
  4. Residual Volume (RV) is the amount of air remaining in the lungs after a forced exhalation.
  5. Total Lung Capacity (TLC) is the sum of all lung volumes, representing the total amount of air the lungs can hold.

Review Questions

  • What is Tidal Volume and why is it important?
  • How does Inspiratory Reserve Volume differ from Expiratory Reserve Volume?
  • What does Residual Volume indicate about lung function?

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