Veins are blood vessels that carry deoxygenated blood back to the heart, except for the pulmonary veins, which carry oxygenated blood from the lungs. They work against gravity with the help of valves that prevent backflow.
Which blood vessels carry blood back to heart from different parts of the body?
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This question is part of 🔬 General Science within the broader 🌐 Current Affairs & GK subject and appears in the PPSC Punjab Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.