Varicose veins are?

• A. Enlarged arteries
• B. Normal veins
• C. Veins with valves that prevent reflux
• D. Enlarged veins in which blood pools

Answer: (D)

Varicose veins occur when the valves in leg veins fail to close properly, allowing blood to flow backward and pool in the veins. This venous reflux causes the veins to enlarge and twist, producing the bulging, visible veins typical of the condition. It’s not an enlargement of arteries (that would be an arterial issue), nor are they normal veins, and they aren’t veins with valves preventing reflux—that describes healthy venous function rather than varicose changes.