Question

How is pulmonary artery different from pulmonary vein?

Answer 1

Pulmonary artery:

This artery transports venous blood from the heart to the lungs.

Pulmonary vein:

This vein transports arterial blood from the lungs to the heart.

Difference between pulmonary artery & pulmonary vein:

Pulmonary artery	Pulmonary Vein
1. Pulmonary artery mainly transports deoxygenated blood.	1. Pulmonary vein mainly transports oxygenated blood.
2. These carry blood from the heart to the lungs.	2. They carry blood from the lungs to the heart.
3. They have thicker and elastic walls.	3. Their walls are thin and inelastic.
4. They possess valves.	4. These do not have valves.