Question

Give three differences between artery and vein.

Answer 1

Arteries

1. An artery is a type of blood vessel that carries oxygenated blood away from the heart to various parts of the body.
   Exception: pulmonary artery carries deoxygenated blood.

Veins

1. The veins carry deoxygenated blood to the heart from various parts of the body. In veins, valves are found which prevent the backflow.
   Exception: pulmonary veins carry oxygenated blood.
2. Blood flows through veins under low pressure due to the capillary action of veins.

Arteries	Veins
Involved in carrying oxygenated blood except for pulmonary arteries	Involved in carrying deoxygenated blood except for pulmonary veins.
Their walls are thick, elastic, and highly muscular.	Their walls are thin, non-elastic and fibrous.
They have narrow lumen without valves.	They have a wider lumen with valves.