Arteries are blood vessels that carry oxygen-rich blood away from the heart to the tissues of the body. They have thick, elastic walls to withstand high pressure from the heart's pumping action.
Veins: Veins are blood vessels that carry deoxygenated blood back towards the heart.
Capillaries: Capillaries are tiny blood vessels where gas exchange occurs between blood and tissues.
Aorta: The aorta is the main artery that carries oxygen-rich blood from the left ventricle of the heart to distribute throughout the body.