The document summarizes the major blood vessels and components of blood. It describes the aorta as the largest artery originating from the left ventricle of the heart and distributing oxygenated blood throughout the body. It notes the vena cavae return deoxygenated blood from the body to the right atrium. It also explains pulmonary veins carry oxygenated blood from the lungs to the left atrium, unlike other veins which carry deoxygenated blood. Finally, it outlines arteries carry blood away from the heart to deliver oxygen, nutrients, and remove wastes from cells throughout the body.