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प्रश्न
A vein differs from the artery in having ______.
विकल्प
dark pigmented wall
strong cuticular and muscular wall
valves to control direction of flow
narrow lumen
MCQ
रिक्त स्थान भरें
उत्तर
A vein differs from the artery in having valves to control direction of flow.
Explanation:
Veins have valves that prevent blood from flowing backward.
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