In this slide the pulmonary circulation is reproduced using the following compartments: main and small arterial, pulmonary arteriole and capillary and pulmunary venous. Both main and small arterial sections are modelled with 3-WM elements. Arteriole and capillary sections are reproduced with two resitances (Rpar and Rpc). Pulmonary venous compartment is modelled wit a 2-WM element (Rvp and Cvp). In the network Pt is the mean intrathoracic pressure.