Do Veins carry blood away from or towards the heart?
Towards
Veins carry blood towards the heart. The heart pumps oxygenated blood to the body through arteries, which branch into smaller vessels called capillaries. Capillaries then merge into venules, which eventually become larger veins and carry blood back to the heart. The blood in veins usually has a lower oxygen concentration and a higher carbon dioxide concentration compared to the blood in arteries. The veins contain valves which prevent the backward flow of blood and ensure that the blood flows in the proper direction towards the heart.
More Answers:
Role of Capillaries in Carbon Dioxide and Oxygen Exchange in the Body through DiffusionArteries: Function and Exception of the Pulmonary Artery
Importance of Veins: The Vital Role They Play in Oxygenating and Deoxygenating Blood
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