Write three differences between an artery and a vein.

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Solution

Blood vessels are a networks of hollow tubes like pipes, which carry blood to and from all parts of the body.
These vessels carry blood in both the directions, i.e. one from the heart to all other parts and another from all body parts to the heart.
There are three types of blood vessels namely arteries, veins and capillaries.
Arteries Vein
1. They carry oxygenated blood (blood that carries a large amount of oxygen) rich in nutrients. 1. They carry deoxygenated blood (blood that carries a large amount of carbon dioxide) rich in waste materials.
2. They carry blood from the heart to the different parts of the body. 2. They carry blood from the different parts of the body to the heart.
3. They have thick muscular walls and narrower lumen. 3. They have thinner walls and lumen is not narrow.

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Arteries	Vein
1. They carry oxygenated blood (blood that carries a large amount of oxygen) rich in nutrients.	1. They carry deoxygenated blood (blood that carries a large amount of carbon dioxide) rich in waste materials.
2. They carry blood from the heart to the different parts of the body.	2. They carry blood from the different parts of the body to the heart.
3. They have thick muscular walls and narrower lumen.	3. They have thinner walls and lumen is not narrow.