Blood Vessel Diameter: Understanding Vasodilation & Vasoconstriction

Arterioles

• Vasodilation: Increases blood flow to tissues
• Vasoconstriction: Decreases blood flow to tissues

Venules

• Vasodilation: Increases blood return to the heart
• Vasoconstriction: Decreases blood return to the heart

Arteries

• Vasodilation: Increases blood flow to tissues
• Vasoconstriction: Increases blood pressure

Veins

• Vasodilation: Decreases blood pressure
• Vasoconstriction: Increases blood pressure