Yes, those veins are the largest in our body, they are called the superior and inferior vena cava.
The heart pumps it. When your heart beats it squeezes blood in the heart into the arteries and from the arteries to the veins and from the veins back into the heart.
Veins carry deoxygenated blood back the heart.
Blood flows away from the heart in arteries, and towards the heart in veins.
The blood in veins appear green on the skin because the skin serves as a filter for the color red which perceives the color as green. Under normal light, blood appears as a red color.
Veins are thin. They carry blood to the heart and brain.
Arteries drain (pump blood) into veins. Veins drain into your lungs and heart to be re-oxygenated. (This is not true for veins and arteries to and from your lungs.)
Veins
veins, maybe
Veins. Veins carry unoxygenated blood towards the heart.
Veins are blood vessels that carry blood toward the heart.
The heart chambers are not called arteries and veins. Heart chambers are atria and ventricles.
Veins carry blood back to the heart. In contrast, arteries carry blood away from the heart.