Answer:
The veins exhibit high compliance, which means that they are high-volume and low-pressure vessels, that is, even a marginal elevation in pressure expands the volume a lot. On the other hand, the arteries exhibit low compliance, that is, they are low in volume and are the high-pressure vessels. This signifies that with a similar amount of pressure, their volume does not enhance as much.
Thus, the high compliance of veins permits them to hold huge volumes of blood with slight modification in pressure.