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| Parameter | Pulmonary system | Aortic system |
|---|---|---|
| Output | 3.5 L/min/m2 | 3.5 L/min/m2 |
| Pressure | Low (25/10 mmHg) | High (120/80 mmHg) |
| Resistance | Low (1/10th of systemic) | High (allows for redistribution) |
| Distribution of resistance | Equal across arteries, capillaries and veins | Predominantly muscular arterioles |
| Vascular resistance determinant | Transmural pressure gradient | Arteriolar tone |
| Work load and metabolic demand | Low | High |
