Biology for IGCSE & O level - Transport In Animals (Section 3 - No. 49)
What is the function of the atrioventricular valves during ventricular systole?
They open to allow blood flow into the ventricles.
They close to prevent blood from flowing back into the atria.
They remain partially open to regulate blood flow.
They are not involved during ventricular systole.
Explanation
The atrioventricular valves close during ventricular systole to prevent backflow into the atria.
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