Facts About Circulation And The Heart
Capillaries carry some oxygen and are only one cell thick. They also help to break down the food.
Arteries carry oxygen to parts
of your body and veins carry it back.
Veins have thinner walls than arteries and there is the biggest vein in your body which is known as the Vena Cava.
Blood carried by arteries is
highly oxygenated and blood
carried by veins has no oxygen
and its job is to carry blood back
to the heart to be re-oxygenated.