regulation of systemic arterial blood pressure by physical factors regulation of systemic arterial blood pressure by capillary fluid shift GO:0003049 The intrinsic circulatory process resulting from capillary fluid shift that modulates the force with which blood travels through the systemic arterial circulatory system. Capillary fluid shift is the movement of fluid across the capillary membrane between the blood and the interstitial fluid compartment. biological_process blood pressure regulation by capillary fluid shift