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Question

Difficulty: MediumHuman Anatomy and Body Systems

After absorbing oxygen in the lungs, blood travels directly to the left atrium of the heart through which vessels?

  1. A
    Pulmonary arteries
  2. Pulmonary veinsAnswer
  3. C
    Superior and inferior venae cavae
  4. D
    Aorta

Answer

Pulmonary veins
Veins are defined as blood vessels that carry blood toward the heart. In pulmonary circulation, freshly oxygenated blood leaves the lungs and enters the left atrium via the pulmonary veins, making them an important exception to the rule that veins typically carry deoxygenated blood.

Step-by-Step Solution

1
Identify the vessel type returning blood to heart chambers
Veins carry blood toward the heart, while arteries carry blood away from the heart.
Anatomical classification of blood vessels depends on the direction of blood flow relative to the heart.
2
Trace the specific pathway of blood from the respiratory exchange site to the left atrium
Oxygenated blood exiting the pulmonary circuit converges into the pulmonary veins.
The pulmonary veins are the specific vessels connecting the lungs to the left atrium of the heart.

Key Concept

Pulmonary circulation and vessel directionality
Estimated Time:45s
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Topics

Human Anatomy and Body Systems

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