What happens to blood vessel size?

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

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