Question

Write any four differences between arteries and veins in mammals.

Answer 1

Arteries Veins
Arteries carry pure blood from the heart to supply all the tissues except for pulmonary artery. Veins carry deoxygenated blood to the heart and the lungs except for pulmonary veins.
Arteries branch out to form capillaries which supply oxygenated blood to all the organs. Veins are formed by many capillaries joining together to dump the deoxygenated blood from different tissues.
Arteries have thick walls as blood in them flows under great pressure. Veins have thin muscular walls as blood in them flows under less pressure.
Arteries do not have any valves in them. Veins have valves in them to prevent backward flow of the blood.

Answer 2

$\boxed{Arteries}$

⏩It carry blood away from the heart to various organs of the body.

⏩ It have thick and elastic walls.

⏩ It doesn't have valves.

$\boxed{Veins}$

⏩ It collect blood from different organs and bring it back to heart.

⏩ It doesn't have thick and elastic walls.

⏩ It have valves to ensure that the blood flows only in one direction.

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