Q3 . veins are thin walled and have valves because
A) veins have larger diameter so I have less blood pressure .
B) they carry deoxygenated blood and valves prevent their backflow
C) both A and B are correct
D) pulmonary vein carry oxygenated blood
Answers
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Answer:
Answer is (A)
Explanation:
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Answered by
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Answer:
correct answer is option (C) .
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