Lung Volumes and Capacities

Lung Volumes and Capacities

Lung volumes, which are also known as respiratory volumes, refer to the various volumes of gas in the lungs at any given time during the respiratory cycle. Lung capacities are derived from a summation of different lung volumes. It is important to have an understanding...
Understanding the Ventilation-Perfusion Relationship

Understanding the Ventilation-Perfusion Relationship

To ensure that enough oxygen is provided by ventilation to saturate the blood fully requires that ventilation and perfusion of the lungs are adequately matched. Ventilation (V) refers to the flow of air into and out of the alveoli, while perfusion (Q) refers to the...

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