Algonquin College Health Program Assessment (AC-HPAT) Practice Exam

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What structure is represented as number 1 in standard anatomical diagrams of the heart?

  1. Left atrium

  2. Right atrium

  3. Superior vena cava

  4. Aorta

The correct answer is: Right atrium

In standard anatomical diagrams of the heart, the structure commonly labeled as the first number is typically the right atrium. This is due to its position relative to the heart's orientation in diagrams, where the right side is usually depicted on the left side of the image as you face it. The right atrium receives deoxygenated blood from the body through the superior and inferior vena cavae and sends it to the right ventricle, which then pumps it to the lungs for oxygenation. Understanding the heart's layout is crucial for students learning about cardiovascular anatomy and physiology, as it lays a foundation for further studies regarding blood flow and heart function.