Multiple choice

How many heart valves would a blood cell, travelling from the renal vein to the pulmonary vein, pass through?

  1. Two

  2. Four

  3. Three

  4. One
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A Correct answer
Explanation

A blood cell traveling from renal vein → inferior vena cava → right atrium → right ventricle → pulmonary artery → lungs → pulmonary vein passes TWO valves: tricuspid (right atrioventricular) and pulmonary semilunar. Mitral and aortic valves are on the left side.

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