A level Biology Revision "The Cardiac Cycle"
Freesciencelessons・2 minutes read
The cardiac cycle involves events in the heart where blood moves through different chambers, with systole referring to contraction and diastole to relaxation. Blood flows from the atria to the ventricles, with valves opening and closing to control the flow, ultimately preparing the heart for the next cycle.
Insights
- A crucial aspect of the cardiac cycle is the distinction between systole (contraction) and diastole (relaxation), highlighting the intricate process of blood movement through the heart's chambers.
- The sequence of events during the cardiac cycle involves blood flowing from the atria to the ventricles, with specific phases like atrial and ventricular systole leading to efficient pumping of blood, ultimately culminating in ventricular diastole to reset the heart for the next cycle.
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Recent questions
What are the two main phases of the cardiac cycle?
Systole and diastole
What is the direction of blood flow during the cardiac cycle?
Atria to ventricles
What happens during atrial systole in the cardiac cycle?
Blood moves from atria to ventricles
What occurs during ventricular systole in the cardiac cycle?
Blood is pumped out of the heart
What happens during ventricular diastole in the cardiac cycle?
Prepares the heart for the next cycle
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Summary
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Cardiac cycle: Contraction, relaxation, and blood flow.
- The cardiac cycle involves events in the heart where blood moves through different chambers. Systole refers to contraction, while diastole means relaxation. Blood flows from the atria to the ventricles, with valves opening and closing to control the flow.
- During the cycle, atrial systole leads to blood moving from the atria to the ventricles, followed by ventricular systole where blood is pumped out of the heart. The cycle ends with ventricular diastole, preparing the heart for the next cycle.
