Which of the following BEST describes varicose veins? A. Veins cannot prevent the backflow of blood.
B. Veins lose the ability to transport blood to the heart.
C. Veins become used for transporting blood to and from the heart.
D. Veins become less efficient at transferring waste to the blood.

Varicose veins can best be described as veins cannot prevent the backflow of blood.

Explanation:

Varicose veins are a manifestation of venous insufficiency or peripheral vascular insufficiency.

Veins are blood vessels that, unlike arteries, are not able to contract, so they depend on gravity, muscle contractions and a system of valves to be able to carry blood to the heart.

When the venous valves do not work, the blood is not transported properly, backflow occurs and is retained, producing dilation of the vein walls, which is characteristic of varicose veins. In this case, veins cannot prevent the backflow of blood.

The other options are not correct because:

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