Circulatory System

6. The artery that carries deoxygenated blood from the right ventricle to the lungs.
9. The lower chamber of the heart that pumps oxygenated blood to the rest of the body.
11. The arteries that supply oxygenated blood to the heart muscle itself.
14. The lower chamber of the heart that pumps deoxygenated blood to the lungs for oxygenation.
15. The upper chamber of the heart that receives oxygenated blood from the lungs.
16. The blood vessels that carry blood away from the heart, typically oxygenated (except pulmonary arteries).

1. The vein that carries deoxygenated blood from the body to the right atrium.
2. A device implanted in the heart to regulate the heartbeat and ensure it beats at a proper rate.
3. A structure in the heart and veins that prevents the backward flow of blood.
4. The large artery that carries oxygenated blood from the left ventricle to the body.
5. The blood vessels that carry blood toward the heart, typically deoxygenated (except pulmonary veins).
6. The veins that carry oxygenated blood from the lungs to the left atrium.
7. A condition that occurs when the blood flow to a part of the heart is blocked, causing damage to the heart muscle.
8. The upper chamber of the heart that receives deoxygenated blood from the body.
10. The tiny blood vessels that allow exchange of gases, nutrients, and waste between the blood and tissues.
12. The muscular organ that pumps blood throughout the body.
13. The muscular wall that separates the right and left sides of the heart.