Multiple choice

Oxygenated blood reaches heart by _______.

  1. pulmonary artery

  2. pulmonary vein

  3. aorta

  4. vena cava

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The pulmonary veins carry oxygen-rich blood from the lungs back to the left atrium of the heart. This is a notable exception to the general rule that veins carry deoxygenated blood. The pulmonary artery, conversely, carries deoxygenated blood from the heart to the lungs.

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