Figure 2
From: Measuring the lung function in the mouse: the challenge of size
Two common and basic mechanical models of the lung. A: A homogeneously ventilated model consisting of a single elastic balloon (elastance E) served by a single flow-resistive pipe (resistance R). B: A homogeneous model again with a single airway (resistance R 1), but with a Kelvin body consisting of two springs (E 1 and E 2) and a dashpot (resistance R2) to account for the viscoelastic behavior of the lung tissue.