Discussion
Which of the following carry oxygenated blood?
1. Pulmonary artery
2. Pulmonary vein
3. Systemic vein
4. Systemic artery
Choose the most appropriate answer from the options given below:
Answer: D
The vessels carrying oxygenated blood are 2 and 4 only: the pulmonary vein and the systemic artery.
Blood is oxygenated in the lungs and returns to the left atrium through the pulmonary veins. The left ventricle then pumps it through the aorta and the systemic arteries to the body.
The pulmonary artery is the exception among arteries: it carries deoxygenated blood from the right ventricle to the lungs. Systemic veins return deoxygenated blood from the body to the right atrium. So options with 1 or 3 are wrong.
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