What force is most important in returning blood back to the heart in the veins?

Question

Quizplus · Accepted Answer

Contraction of the skeletal muscles in the body is the most important force in returning blood back to the heart in the veins. When muscles contract, they squeeze the veins around them, which pushes blood towards the heart. This is important because veins do not have the same level of pressure as arteries, and so blood needs help returning to the heart against gravity.

What Force Is Most Important in Returning Blood Back to the Heart