Anatomy & Physiology Cardiac #11

Question

Which is the correct pathway for blood through the heart for pulmonary circulation?

Answers

  1. Left atrium, left atrioventricular valve, left ventricle, pulmonary valve, pulmonary artery, lungs.
    • Rationale:

      This is not the correct pathway when blood travels through the heart during pulmonary circulation.

  2. Lungs, pulmonary vein, left atrium, left atrioventricular valve, left ventricle, aorta, aortic valve, body.
    • Rationale:

      Pulmonary circulation begins in the right atrium, not the lungs.

  3. Lungs, pulmonary artery, pulmonary valve, right ventricle, right atrioventricular valve, right atrium.
    • Rationale:

      This is not the correct pathway when blood travels through the heart during pulmonary circulation.

  4. Right atrium, right atrioventricular valve, right ventricle, pulmonary valve, pulmonary artery, lungs.
    • Rationale:

      This is the correct sequence in which blood travels during pulmonary circulation to enter the lungs for oxygenation to occur.

Overview

Pulmonary circulation is defined as the passage of blood from the right side of the heart through arteries to the lungs.

Explanation

Learning Outcomes

Oxygen-poor blood enters the heart through the vena cava. The correct pathway, or sequence, that blood travels to become oxygenated is as follows: right atrium, right atrioventricular (AV valve), right ventricle, pulmonary valve, pulmonary artery, and the lungs. Blood is oxygenated in the lungs and is returned to the left side of the heart via the pulmonary vein.

Test Taking Tip

Consider both the structure and the function of the heart to answer this question correctly.

Video Rationale