they take blood to the heart or take through you're body
Veins
Veins return blood to the heart.The pulmonary veins.
Varicose veins form when blood pools in the veins.
because you blood is inside your veins.
veins are blood vessels
blood vessels that carry blood toward the heart are called veins.
Veins have valves in them which help transport the blood.
Blood flow is faster in arteries than in veins. Blood flow in veins is lower pressure.
Veins carry deoxygenated blood to the heart
Blood in veins is sent to the heart to get oxygen.
The veins return the deoxygenated blood to the heart.
The pulmonary veins are the only veins in the body that carry oxygenated blood. Like all veins the blood in the pulmonary veins travel toward the heart.