Which of the following assists in moving venous blood back to the heart?
A) Contraction of skeletal muscles
B) One-way valves in the veins
C) The changing pressure in the chest caused by breathing
D) All of the above

Question

Quizplus · Accepted Answer

All of the choices listed – contraction of skeletal muscles, one-way valves in the veins, and changing pressure in the chest caused by breathing – assist in moving venous blood back to the heart. Contraction of skeletal muscles helps to squeeze veins and push blood towards the heart, one-way valves in the veins prevent backflow of blood, and changes in chest pressure caused by breathing can also help to move blood towards the heart.

Which of the Following Assists in Moving Venous Blood Back