Biology · Circulatory System
During ventricular contraction (systole), which structural components prevent the backflow of blood into the atria?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Pericardial fluid
- 2Thin walls of atria
- 3Thick muscular walls of ventricles
- 4Valves inside the heart✓
Correct answer
Valves inside the heart
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