capillaries
vein
Veins - return deoxygenated blood to the heart to be reoxygenated. In contrast to arteries that bring the oxgenated blood from the heart, to the rest of the body for use.
Artery (Aorta is the main vessel that allows blood travel from the heart to all parts of the body, except the lungs).
veins from the body or the pulmonary veins from the lungs