1. Heart Presentation Michele Lin Blk.: D

2. B l o o d F l o w

3. Facts about blood flow First the blood enters through the right atrium of the heart. It flows into the right ventricle and into the pulmonary arteries. The oxygen-poor blood flows through to the lungs. The pulmonary veins take the oxygen-rich blood to the left atrium and into the left ventricle. From the left ventricle the oxygen-rich blood flows into the aorta. The aorta pumps the blood to the rest of the body.

4. Superior 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.

5. Inferior vena cava 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.

6. Right atrium and Left atrium - The right atrium is one of four chambers 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. -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.

7. Right ventricle & Left 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. The left ventricle is one of four chambers 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. Right ventricle Left ventricle

8. 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. AORTA

9. Pulmonary artery & Pulmonary vein The pulmonary arteries carry blood from the heart to the lungs. They are the only arteries that carry deoxygenated blood. 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. Tricuspid valve & Aortic valve The tricuspid valve is on the right side of the heart, between the right atrium and the right ventricle. The normal tricuspid valve usually has three leaflets and three papillary muscles. The aortic valve is one of the valves of the heart. It lies between the left ventricle and the aorta. The mitral valve and the tricuspid valve are known collectively as the atrioventricular valves because they lie between the atria and the ventricles of the heart and control flow. Aortic valve Tricuspid valve Mitral valve

11. MRI scans & CT scans of heart

12. Blood circulation through lungs Blood first travels to the right ventricle through an atrioventricular valve and is then sent to the lungs to be reoxygenated. It first travels through a semilunar valve which separates the right ventricle and the pulmonary artery. The circulation of blood between the lungs and heart is called the pulmonary circuit.

13. Ultrasound of Heart Ultrasound is sound with a frequency greater than the upper limit of human hearing, this limit being approximately 20 kilohertz (20,000 hertz). Ultrasound has been used to detect some heart diseases.

14. Heart muscle The heart muscle is called the Myocardium. The myocardium is composed of specialized cardiac muscle cells with an ability not possessed by muscle tissue elsewhere in the body. Cardiac muscle, like other muscles, can contract, but it can also conduct electricity, like nerves. The blood supply of the myocardium is by the coronary arteries.

15. Septum The septum of the heart is the dividing wall between the right and left sides of the heart. That portion of the septum that separates the two upper chambers of the heart is termed the atrial septum while the portion of the septum that lies between the two lower chambers of the heart is called the ventricular septum

16. Nuclear medicine scan of heart The scan is requested when a patient has chest pain and the doctors are not sure if it is coming from the heart or not. The scan displays in real time whether there's any ischaemia (lack of blood supply) in a particular area of the heart. area of the heart. area of the heart.

17. Sound of heart beat