What Is Vascular Resistance?

Vascular resistance is the total resistance to blood flow in the vascular system. Most of it occurs in the arterioles, especially the arterioles. Arterioles and arterioles contract and relax, which can significantly affect blood flow in organs and tissues. The maintenance of normal blood pressure depends to some extent on the resistance of peripheral vascular arterioles and arterioles to blood flow, that is, peripheral resistance. Because they are located before the capillaries, they are also called precapillary resistance vessels.

Vascular resistance

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Vascular resistance is the total resistance to blood flow in the vascular system. Most of it occurs in the arterioles, especially the arterioles. Arterioles and arterioles contract and relax, which can significantly affect blood flow in organs and tissues. The maintenance of normal blood pressure depends to some extent on the resistance of peripheral vascular arterioles and arterioles to blood flow, that is, peripheral resistance. Because they are located before the capillaries, they are also called precapillary resistance vessels.