Which blood vessel returns oxygenated blood from the lungs to the left atrium?
Correct answer: B. Pulmonary vein
- A. Pulmonary artery
- B. Pulmonary vein
- C. Superior vena cava
- D. Bronchial artery
Explanation
Pulmonary veins carry oxygenated blood from the pulmonary capillaries to the left atrium. The pulmonary artery carries deoxygenated blood from the right ventricle to the lungs, unlike most systemic arteries.
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About Respiratory System
The respiratory system includes the air passages, lungs, pleura, alveoli and the mechanics of breathing. It explains pulmonary ventilation, gas exchange, oxygen and carbon dioxide transport, regulation of breathing, and the difference between external respiration in the lungs and internal respiration in body tissues.
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