Final answer:
Veins have valves and are assisted by skeletal muscles to move blood towards the heart.
Step-by-step explanation:
Veins have several structures that help with the movement of blood towards the heart:
- Valves: Veins have valves that prevent the backflow of blood. These valves ensure that blood only flows towards the heart and doesn't flow in the opposite direction.
- Skeletal muscles: The squeezing action of surrounding skeletal muscles helps to push blood towards the heart. For example, when you walk or exercise, the contraction of your leg muscles helps to propel blood through the veins and back to the heart.