What is the difference between arteries and veins?

1. The arteries carry blood away from the heart. Veins carry blood to the heart.
2. Wall structure: Arteries have thicker walls than veins, which helps them withstand the high pressure of the blood being pumped out of the heart. Veins have thinner walls than arteries, which allows them to stretch and accommodate the large volume of blood that flows through them.
3. Valves: Veins have one-way valves that help to ensure that the blood flows in the correct direction, towards the heart. Arteries do not have valves.
4. Location: Arteries are often deeper in the body than veins. Veins are closer to the surface of the skin and are often visible.
5. Size: Arteries are typically larger in diameter than veins, which allows them to accommodate the high volume of blood being pumped out of the heart.
6. Oxygen content: The oxygen content in the blood is higher in the arteries than in the veins. Veins are responsible for bringing back oxygen-poor blood to the heart and lungs, where it is re-oxygenated and re-circulated.

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