Venous Return Flashcards
1
Q
Venous return is made of 5 components:
A
Skeletal pump Smooth muscle Pocket valves Respiratory pump Gravity
2
Q
Skeletal pump:
A
Muscles surround the veins expand and contract, pressing on veins and causing a pumping effect
Particularly important during exercise
Active cool down vital
3
Q
Smooth muscle:
A
Work with voluntary muscles to help squeeze the blood back to the heart
4
Q
Pocket valves:
A
Stop blood in veins return back to where it came from
Flow one way to the heart
5
Q
Respiratory pump:
A
Increase in breathing rate and depth (tidal volume) from exercise, change the pressure within the thorax and abdomen (thoracic cavity)
Breathing in - increased pressure compresses the veins and squeezes the blood in to the veins that supply the heart
6
Q
Gravity:
A
Assists the flow of blood from above the heart
Need to move around as it hinders lower body
