Figure 6.

Compartmentalization of two example complex circulatory systems. (a) Crocodile circulation network, (b) octopus circulation with three isolated ventricles. Individual compartments are shown in hexagonal cells. In this compartmentalization scheme, edges connecting cells consist of a resistance and inertance in series, whereas compliance elements are located on the vertices. Organ or valve resistance and inertances are conceptually shared between the two neighbouring compartments. The multiple inlet and outlets are treated as one combined branch in the governing equations. FP, foramen of Panizza; ano, anastomosis shunt; PVR, lungs; LAo and RAo, left and right aorta, respectively; LV, RV and SV, left, right and single ventricle, respectively; pul and sys, pulmonary and systemic, respectively; subC, subclavian; EBV and ABV, efferent and afferent branchial vessels, respectively; BH, branchial heart, AV, atrio-ventricular; Ao, aortic. (Online version in colour.)