Venous Return Flashcards
1
Q
What is venous return?
A
How the deoxygenated blood gets back to the heart in the veins
2
Q
What are the 5 components of venous return?
A
Gravity Smooth muscle Respiratory pump Muscle pump Valves
3
Q
How does gravity help?
A
Veins in the upper body are aided by gravity to get blood back to the heart
4
Q
How do valves help?
A
They prevent backflow of blood so it always flows towards the heart
5
Q
How does smooth muscle help?
A
The wall of each vein contains smooth muscle which can contract and helps to push blood back to the heart
6
Q
How does respiratory pump help?
A
While exercising we breathe faster and deeper so the pressure goes from high to low and helps the blood get squeezed back to the heart
7
Q
How does muscle pump help?
A
Many veins are between skeletal muscles, when they contract they force the blood through the vein
