Questions: About 70% of the ventricle filling is achieved passively without the contraction of the atria. True or False

The answer is True.

Explanation: The majority of ventricular filling occurs passively during the diastolic phase of the cardiac cycle. This passive filling happens as blood flows from the atria to the ventricles due to the pressure gradient between these chambers. Approximately 70% of the ventricular filling is achieved in this manner, without the need for atrial contraction. The remaining 30% of ventricular filling is accomplished during atrial systole, when the atria contract to push additional blood into the ventricles. Therefore, the statement that about 70% of the ventricle filling is achieved passively without the contraction of the atria is true.