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HMS, BM EQ-Bank 867 MC

Which of the following correctly describes the path of deoxygenated blood through the pulmonary circulation?

  1. Left ventricle → pulmonary artery → lungs → pulmonary vein → left atrium
  2. Right ventricle → pulmonary artery → lungs → pulmonary vein → left atrium
  3. Right atrium → right ventricle → aorta → lungs → pulmonary vein → left atrium
  4. Left atrium → left ventricle → pulmonary artery → lungs → pulmonary vein
Show Answers Only

\(B\)

Show Worked Solution
  • B is correct. Deoxygenated blood flows from the right ventricle through the pulmonary artery to the lungs, where it becomes oxygenated and returns to the left atrium via the pulmonary veins.

Other Options:

  • A is incorrect: The left ventricle pumps oxygenated blood to the body, not to the lungs.
  • C is incorrect: Blood from the right ventricle goes to the lungs via the pulmonary artery, not the aorta.
  • D is incorrect: The left atrium receives oxygenated blood from the lungs and does not pump deoxygenated blood.