A varicose vein is:
A. an enlarged, dilated vein toward the surface of the skin.
B. the main artery leaving the heart and distributing oxygenated blood throughout the body.
C. a large-diameter vein that gathers blood from the lower portion of the body and returns it to the heart.
D. a large-diameter vein that gathers blood from the upper portion of the body and returns it to the heart.
E. the lower portion of each side of the heart.
Answer: A
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