venous return
- Created by: Lydiawhitehouse
- Created on: 24-06-19 13:42
View mindmap
- venous return
- the transport of deoxygenated blood to the right side of the heart
- increased when doing exercise
- starlings law of the heart
- stroke volume is dependent on venous return
- pocket valves
- one way valves
- prevent back flow
- direct blood towards the heart
- muscle pump
- veins between skeletal muscles
- when muscles contract on exercise blood squeezed along theses veins back to heart
- respiratory pump
- breathing deeper and faster in exercise
- pressure changes in thorax and abdomen
- increased pressure squeezes large veins here forcing blood back to heart
- smooth muscle
- middle layer of veins are smooth muscle
- contraction + relaxation of this pushes blood back to heart
- gravity
- blood from upper body aided by gravity a it flows back to heart
- the transport of deoxygenated blood to the right side of the heart
Comments
No comments have yet been made