The aorta carries oxygenated blood from the left ventricle of the heart to all parts of the body.

The hepatic artery transports blood from the aorta into the liver.

The hepatic portal vein carries blood from the stomach and the intestine into the liver. In other words, it is the blood vessel that carries blood from an organ to an organ.

The pulmonary vein carries oxygenated blood from the lungs to the left auricle (also called left atrium) of the heart. It is the only vein that carries oxygenated blood.

The renal vein transports blood from the kidney into the inferior vena cava.

The vena cava carries deoxygenated blood from all parts of the body to the right auricle of the heart.

Arteries have thick, muscular walls, whereas veins have thin, muscular walls.

The blood flows with low pressure in veins, whereas the blood flows with high pressure in arteries.

The walls of capillaries comprise a single layer of squamous epithelium.

Veins have non-elastic walls, whereas arteries have elastic walls.

Veins are normally located just below the skin (superficially), whereas arteries are normally located deep below the skin.

Veins have a narrow lumen (the central space through which blood flows), whereas arteries have a broad lumen.

Valves are absent in arteries, whereas thin valves are present in veins.

If an artery is empty (no flow of blood), it does not collapse, whereas if a vein is empty, it collapses.

Muscles are absent in the walls of capillaries, whereas muscles are present in the walls of veins and arteries.