FIGURE 6 Relaxation pressure-volume curves of lungs (l), chest wall (w), and total respiratory system (rs). Arrows on diagrams by RV, FRC, and TLC indicate magnitude and direction of lung and chest wall elastic forces, and numbers indicate pressures. Prs equals the sum of Pl and Pcw, which are equal and opposite at FRC. Lung minimal volume (MV) cannot be measured in the intact respiratory system. (After Rahn et al, Am J Physiol 1946;146:161.)

Relaxation Audio Sounds Lazy Summer Day

Relaxation Audio Sounds Lazy Summer Day

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