Blood enters the heart because of the

Auricular diastole

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Ventricular systole

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Ventricular diastole

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Auricular systole

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Solution

The correct option is A Auricular diastole
Blood enters from superior and inferior vena cava into the right auricle during the relaxation phase of the atrium. The pressure difference between the vena cava and the inside chamber of the right auricle allows the deoxygenated blood to enter the heart.
So, the correct answer is option A.

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