Health, 22.08.2019 17:30, 2022maldonadoleonel

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.

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Which of the following best describes varicose veins?
a. veins cannot prevent the backflow of...