Arterial reservoir
= Arterial reservoir
{title2=$dV_a=C_a\,dp_a$}
A lumped <arterial reservoir> stores <blood> by elastic expansion. Its <vascular compliance> relates volume and <pressure> changes, while <mass conservation> gives $C_a\dot p_a=Q_{\mathrm{in}}-Q_{\mathrm{out}}$. This storage smooths intermittent ventricular input into continuing peripheral flow.