Both arteries and veins have the ability to dilate and constrict to regulate the amount of blood passing through them.

Name: Both arteries and veins have the ability to dilate and constrict to regulate the amount of blood passing through them.
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Both arteries and veins have smooth muscle in their walls that can contract (constrict) or relax (dilate) in response to various signals, including hormonal and nervous system signals, to regulate blood flow.

Both Arteries and Veins Have the Ability to Dilate and Constrict