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  4. The figure given below shows three stages in the cardiac cycle. <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/biology/39ffced04716e5c2fb88ede0ff7056a2-.png /> Which of the following sequences is correct regarding this?

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Q. The figure given below shows three stages in the cardiac cycle.
image
Which of the following sequences is correct regarding this?

Body Fluids and Circulation

Solution:

In figure $(2)$, blood is entering into the right auricle through superior and inferior vena cava and blood is entering into left auricle through pulmonary vein . Figure $(1)$ shows movement of blood from the auricles into the ventricles. Figure $(3)$ shows movement of blood from the right ventricle into the pulmonary artery and from the left ventricle into aorta.