CARDIAC CYCLE
- Created by: rosal14
- Created on: 16-05-18 09:39
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- CARDIAC CYCLE
- (1) ATRIAL SYSTOLE
- Ventricles RELAX
- Atria CONTRACT, volume decreases, pressure increases
- Blood pushed through AV valve into ventricles
- (Slight increase in ventricular pressure while blood flows in)
- Blood pushed through AV valve into ventricles
- Atria CONTRACT, volume decreases, pressure increases
- Ventricles RELAX
- (2)VENTRICULAR SYSTOLE
- Atria RELAX
- Ventricles CONTRACT, volume decreases, pressure increases
- AV valves CLOSE as pressure in ventricles is above that of atria
- SL valves OPEN as pressure in ventricles is above that of arteries
- Blood pushed through semilunar valve INTO ARTERIES
- SL valves OPEN as pressure in ventricles is above that of arteries
- AV valves CLOSE as pressure in ventricles is above that of atria
- Ventricles CONTRACT, volume decreases, pressure increases
- Atria RELAX
- (3)DIASTOLE
- Atria and Ventricles RELAX
- SL valves CLOSE as pressure in arteries is higher than in ventricles
- Pressure higher in veins so blood flows INTO ATRIA, increasing pressure
- Pressure of atria higher than ventricles so AV valve OPENS
- Blood flows INTO VENTRICLES
- Pressure of atria higher than ventricles so AV valve OPENS
- Pressure higher in veins so blood flows INTO ATRIA, increasing pressure
- SL valves CLOSE as pressure in arteries is higher than in ventricles
- Atria and Ventricles RELAX
- (1) ATRIAL SYSTOLE
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