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Blood vessels include arteries, capillaries, and veins. Blood vessels include arteries, capillaries, and veins.
Arteries have more smooth muscle than veins. Arteries have more smooth muscle than veins.
Veins have slower blood velocity than capillaries. Veins have slower blood velocity than capillaries.
Capillaries exchange dissolved substances with interstitial fluids. Capillaries exchange dissolved substances with interstitial fluids.
The heart pumps interstitial fluids.
