Question

tion 66 (0.5 points)
ich is true about the pulmonary veins?
they carry blood that is low in oxygen and high in carbon dioxide gasses to the right atrium.
they deliver oxygen rich blood directly to the myocardium.
there are 2 of them.
if they were blocked, decreased blood would be delivered to the left atrium.
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Explanation:

• Analyze each option:
• First option: Pulmonary veins carry oxygen - rich blood to the left atrium, not low - oxygen blood to the right atrium. So this is wrong.
• Second option: Coronary arteries deliver blood to the myocardium, not pulmonary veins. So this is wrong.
• Third option: There are four pulmonary veins (two from each lung), so "there are 2 of them" is wrong.
• Fourth option: Pulmonary veins carry blood from the lungs to the left atrium. If they were blocked, less blood would reach the left atrium. This is correct.

Answer:

If they were blocked, decreased blood would be delivered to the left atrium.