The estimated relative values for parameters R1–R5 and C1–C4 (Fig. 2) together with their approximate physiologic characteristics
| Parameter | Physical Interpretation | Value | SE |
|---|---|---|---|
| R1 | Impedance of arterial capillaries | 1.0 | 0.0025 |
| R2 | Impedance of cerebral aqueduct | ≈0.0 | |
| R3 | Impedance of venous capillaries | ≈0.0 | |
| R5 | Impedance of arteries | 0.01 | 8 × 1.8−3 |
| C1 | Elastic capacitance of arteries | ≈Large | |
| C2 | Elastic capacitance of ventricles | 4.11 | 0.11 |
| C3 | Elastic capacitance of capillaries | ≈0.0 | 5 × 10−3 |
| C4 | Elastic capacitance of veins | 271.017 | 18 |