How is blood kept moving in the large
veins of the legs?
Answers
Answered by
4
Answer:
Valves in the veins keep blood from flowing backwards. The drawing in Figure 5.5 shows that when leg muscles contract they squeeze the veins and push the blood towards the heart. The drawing also shows that veins have valves that prevent the back flow of blood. These are like the valves in the siphon pumps.
Similar questions