Which of the following components make up Vital Capacity (VC)?

Vital Capacity (VC) is a measure of lung function that indicates the maximum amount of air a person can expel from the lungs after taking the deepest breath possible. It encompasses three specific components: Inspiratory Reserve Volume (IRV), Tidal Volume (Vt), and Expiratory Reserve Volume (ERV).

• Inspiratory Reserve Volume refers to the additional air that can be inhaled after a normal inhalation.

• Tidal Volume is the amount of air inhaled or exhaled with each breath during regular breathing.

• Expiratory Reserve Volume is the extra air that can be exhaled after a normal exhalation.

When combined, these three volumes contribute to the total Vital Capacity, as they represent the full range of lung capacity available for inhalation and exhalation beyond normal breathing patterns.

In contrast, the other options include components that either do not belong to VC or incorrectly combine lung volumes that do not represent vital capacity directly. For example, Residual Volume (RV) is a measure of air remaining in the lungs after a maximal exhalation and is therefore not included in the calculation of VC. Similarly, Functional Residual Capacity (FRC) and Total Lung Capacity (TLC) are broader measurements that