The Pulmonary Vein carries oxygenated blood (blood carrying oxygen) to the heart from the lungs and the other superior vena cava and the inferior vena cava (both are veins also) carries de-oxygenated blood (blood not carrying oxygen) to the heart from the body.
efferent
a blood vessel carrying oxygen-rich blood that is mostly blocked or closed off.
The Aorta would have the most because it leads from the heart to the rest of the body. The Aorta is the body's largest artery. It is the main blood vessel carrying oxygenated blood from the heart.
Aorta
Blood veesels that are red are carrying blood that is rich in oxygen. Blood vessels that are blue are carrying blood that is oxygen poor. Red blood cells carry the oxygen, and they are the parts of the blood that turns red when carrying oxygen.
the superior and inferior vena cava.
The main blood vessel carrying blood away from the heart is the aorta. The main blood vessel supplying the heart is the left main artery.
pulmonary vein
The umbilical vein carries oxygen-rich blood from the placenta to the fetus, making it the fetal blood vessel with the highest oxygen concentration.
Veins carry dirty blood or blood with carbon di oxide. Arteries carry blood with oxygen to all parts of the body. The veins carrying dirty blood are finally sent to the lungs where they give up the carbon di oxide and take in oxygen for circulation.
pulmonary artery