Biology for IGCSE & O level - Transport In Animals (Section 2 - No. 40)
During ventricular systole, which of the following events occurs?
Atria contract
Ventricular contraction
The atrioventricular valves open
Blood enters the atria from the veins
Explanation
Ventricular systole is the contraction phase of the ventricles, forcing blood into the arteries.
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