Quoc: Context: Veins are blood vessels that carry blood toward the heart. Most veins carry deoxygenated blood from the tissues back to the heart; exceptions are the pulmonary and umbilical veins, both of which carry oxygenated blood to the heart. In contrast to veins, arteries carry blood away from the heart.\n\nQuestion: do veins carry blood to the heart or away?
HW Chung: OK, some thoughts:
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To answer the question, consider the following: Veins are blood vessels that carry blood toward the heart. The answer is toward.
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