What is the role of veins?

Veins:

1. Veins are the blood vessels present throughout the body.
2. They are tube-like, translucent structures that function by carrying deoxygenated blood from the tissues to the heart for re-oxygenation.
3. Compared to arteries, veins are thin-walled.

Role of veins:

1. Veins are the blood vessels, which carry blood from organs to the heart.
2. Except for the pulmonary vein, All the veins carry impure blood.
3. Pulmonary vein carries pure blood.