1. The Function Of A Heart
By: Craig Leung

2. The Anatomy of the Heart

3. Animated Gif Blood Flow

4. Superior Vena Cava & Inferior Vena Cava
The superior vena cava is a large, yet short vein that carries de-oxygenated blood from the upper half of the body to the heart's right atrium.
The inferior vena cava (or IVC) is the large vein that carries de-oxygenated blood from the lower half of the body into the heart.

5. Right Atrium
The right atrium (in older texts termed the "right auricle") is one of four chambers (two atria and two ventricles) in the human heart. It receives de-oxygenated blood from the superior and inferior vena cava and the coronary sinus, and pumps it into the right ventricle through the tricuspid valve.

6. Right Ventricle
The right ventricle is one of four chambers in the human heart. It receives de-oxygenated blood from the right atrium via the tricuspid valve, and pumps it into the pulmonary artery via the pulmonary valve.

7. Aorta
The aorta is the largest artery in the human body, originating from the left ventricle of the heart and bringing oxygenated blood to all parts of the body in the systemic circulation.

8. Pulmonary Artery
The pulmonary arteries carry blood from the heart to the lungs. They are the only arteries (other than umbilical arteries in the fetus) that carry deoxygenated blood.

9. Pulmonary Vein
The pulmonary veins carry oxygen-rich blood from the lungs to the left atrium of the heart. They are the only veins in the post-fetal human body that carry oxygenated (red) blood.

10. Left Atrium
The left atrium is one of the four chambers in the human heart. It receives oxygenated blood from the pulmonary veins, and pumps it into the left ventricle.
The left ventricle is one of four chambers (two atria and two ventricles) in the human heart. It receives oxygenated blood from the left atrium via the mitral valve, and pumps it into the aorta via the aortic valve.

11. Left Ventricle
The left ventricle is one of four chambers (two atria and two ventricles) in the human heart. It receives oxygenated blood from the left atrium via the mitral valve, and pumps it into the aorta via the aortic valve.

12. Tricuspid Valve
The tricuspid valve is on the right side of the heart, between the right atrium and the right ventricle

13. Aortic Valve & Mitral Valve
The aortic valve is one of the valves of the heart. It lies between the left ventricle and the aorta.
The mitral valve (also known as the bicuspid valve or left atrioventricular valve), is a dual flap (bi = 2) valve in the heart that lies between the left atrium (LA) and the left ventricle

14. Septum
The wall between the two upper chambers (the right and left atrium) of the heart.

15. Heart Muscle
Myocardium is the muscular tissue of the heart.