The Cardiac Cycle
- Created by: Lilly
- Created on: 03-01-13 18:11
View mindmap
- The Cardiac Cycle
- 3- VENTRICAL SYSTOLE
- 2- Pressure higher in ventricles than atria, forces AV valves shut
- 1-Ventricles contract- decreasing volume and increasing pressure in chamber
- 3- Pressure in ventricles higher than in aorta and pulmonary artery, forces open semi-lunar vlaves and blood is forced out
- 1- DIASTOLE
- 1-Higher pressure in pulmonary artery and aorta closes semi-lunar valves to prevent back flow into ventricles
- 2- blood fills atria due to higher pressure in vena cava and pulmonary vein, starts to increase pressure of aorta, pressure in ventricles begins to fall & AV valves open- passive movement of blood
- 2- ATRIAL SYSTOLE
- 2- slight increase in ventrical pressure and chamber volue as the ventricles relieve blood from atria
- 1- Atria contract, decreasing volume of chamber and increasing pressure
- 3- VENTRICAL SYSTOLE
Comments
No comments have yet been made