Maximum reservoir of blood

At rest, at least 50% of the circulating blood volume is in the systemic veins, 12% is in the hea cavities, and 18% is in the low-pressure pulmonary circulation. Only 2% is in the aoa, 8% in the aeries, 1% in the aerioles, and 5% in the capillaries Ref: Ganong's Review of Medical Physiology Twenty-Third Edition Page No:543