Blood
- Created by: caprice
- Created on: 14-10-13 16:51
View mindmap
- Blood
- Arteries
- the walls are very thick
- bllod flows at high pressures in areteris
- blood flows away from the heart
- made up of elastic ribres and smooth muscule
- small lumen
- Veins
- veins carry blood back to the heart. most veins carry deoxygentated blood
- veins have valves to prvent backfloe
- vens have thibn walls but can hold large volumes of blood
- pumpblood at low pressure
- cappilaries
- substances diffuse between cells and the blood quickly
- walls are thin
- no elastic fibres, collagen and smooth muscle
- allows rapid diffusion
- oxygen diffuses out. co2 diffuses in the blood
- Blood Pressure
- when heart contracts blood pressure is at its highest
- peripheral resistance slows down flow of blood
- llitle pressure is lost through arteries because theya are wide
- Blood Clotting
- 1.atlets in contact with damaged areties wall
- 2.atletes become sticky
- 3.platelets plug forms
- 4cascade of chemocal changes
- 5.prothrobin
- 6.throbin
- 7.fibrin
- 8.tangled mesh
- 9.blood cells trapped
- 1o.a clot forms
- 9.blood cells trapped
- 8.tangled mesh
- 7.fibrin
- 6.throbin
- 5.prothrobin
- 4cascade of chemocal changes
- 3.platelets plug forms
- 2.atletes become sticky
- 1.atlets in contact with damaged areties wall
- Arteries
Comments
No comments have yet been made