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Class 9 Biology MCQ App Download | Pulmonary and Systemic Circulation MCQ Apps (Android & iOS)

Class 9 Biology MCQ: Complete Course

Pulmonary and Systemic Circulation MCQ App Download & PDF e-Book | 750

MCQ: 750

The period in the cardiac cycle during which blood is filled into atria and ventricles and atria relaxes is called

  1. atrial diastole
  2. cardiac systole
  3. atrial systole
  4. cardiac diastole

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