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Difficulty: MediumHuman Anatomy and Body Systems

In the human cardiovascular system, the heart functions as a double pump supporting two distinct circuits. Which blood vessel transports oxygen-poor blood directly from the right ventricle to the lungs for gas exchange?

  1. A
    Pulmonary vein
  2. Pulmonary arteryAnswer
  3. C
    Aorta
  4. D
    Inferior vena cava

Answer

Pulmonary artery
Arteries are defined anatomically as vessels that carry blood away from the heart. The pulmonary artery is the primary vessel that carries deoxygenated blood leaving the right ventricle into the lungs for reoxygenation.

Step-by-Step Solution

1
Identify the functional definition of arteries versus veins
Arteries always carry blood away from the heart chambers, whereas veins return blood toward the heart.
Vessel classification is determined by the direction of blood flow relative to the heart, not solely by oxygen content.
2
Trace the blood flow path from the right ventricle
The right ventricle pumps deoxygenated blood into the pulmonary trunk, which branches into the pulmonary arteries leading to the lungs.
This establishes the pulmonary circuit pathway necessary to deliver carbon-dioxide-rich blood to the alveoli for reoxygenation.

Key Concept

Directional blood flow in the pulmonary circuit and anatomical exceptions in vascular oxygenation
Estimated Time:45s
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Topics

Human Anatomy and Body Systems

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