In this electric analogue configuration (Three Cell Model) the pumonary circulation is realised with the following compartments: main and smal arterial section (implemented with 3-WM element), peripheral (3-WM element) and venous (2-WM element) sections. PAP (Qap), PAPS (Qaps) and PAPP (Qapp) are the pressures (flows) in the main, small and peripheral comparments respectively. Qlia is the input left atrial blood flow. PVP is the pulmonary venous pressure.