Veins have valves which make them unique, (as compared to arteries or capillaries). This is to prevent blood from going in the opposite direction.
Since arteries lead away from the heart, the blood travels through using the pressure differential. But since the blood found in veins are so far off from the heart, they require contractions from skeletal muscle to squeeze blood towards the SVC/IVC and back into the right atrium.
veins are blood vessels
Veins
veins, maybe
in the veins
veins
veins from the body or the pulmonary veins from the lungs
The veins carry blood toward the capillaries.
Veins
blood vessels that carry blood toward the heart are called veins.
Veins.
Veins
Veins.