Answer
Blood flow in arteries is pulsatile because arteries are under greater amount of pressure compared to veins. Arteries are located closer to ventricles, so their walls must be capable of expanding and contracting under the changes in pressure when the ventricles contract.
Whereas when blood reaches veins, the pressure becomes very low, and so veins does not have a pulsatile ability to maintain pressure, instead they have valves to prevent backflow.
Work Step by Step
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