Fig. 6.

Schematic representation of respiratory system by the series bicompartment model (Mead 1969). The hydraulic, mechanical, and electrical analogs are presented (a, b, c, respectively). The impedance analogy was applied for the development of each equivalent model. R, C, and P correspond to resistance or resistor, compliance or capacitor, and pressure, respectively. 1 and 2 refer to the different compartments