The electric analogue of the pulmonary circulation consists of pulmonary arterial section implemented with a 4-WM in which Rap represents the arterial pulmonary variable peripheral resistance. The pulmonary venous section is reproduced by a 2-WM  in wich Rvp represents the pulmonary venous resistance. In the network Pt is the mean intrathoracic pressure, Rcp is the pulmonary characteristic resistance, Lap is the pulmonary arterial inertance. Cap (Cvp) is the pulmonary arterial (venous) compliance.