Labeled Parts of the Cardiovascular System The diagram is labeled with the main parts of the cardiovascular system: the heart, arteries, capillaries, and veins.

The system of blood vessels in the human body measure about 60,000 miles (96,560 kilometers). Arteries carry oxygen-rich blood from the heart through the body.

The cardiovascular system consists of the heart, veins, arteries, and capillaries. These components make up two circulatory systems: the systemic and pulmonary circulatory systems.