1. Left Atrium Left Ventricle Aorta Pulmonary Veins Mitral Valve Aortic Valve Body FLOWOFBLOODFLOWOFBLOOD Oxygenated blood from the lungs returns to the heart and enters the Left Atrium. http://www.youtube.com/watch?v=PgI80Ue- AMo&feature=related

2. Heart Conduction The heart is made up of special muscle called Cardiac Muscle. This muscle has the ability to expand and contract and is regulated by the heart’s own conduction system. The conduction system is similar to an electrical outlet: Once “plugged in” electricity flows through the heart causing it to beat. The sounds of the heart “lub dub” are actually the heart valves opening and closing with each electrical impulse.

3. http://www.youtube.com/watch?v=rguztY8aq pk&feature=related

4. Electrocardiogram (ECG or EKG) A test used to measure the electrical activity of the heart. Informs us if the heart is beating too fast, too slow, normally or irregularly. http://www.youtube.com/watch?v=nK0_28q6 WoM&feature=related

6. Echocardiogram A test in which ultrasound, a type of sound wave, is used to obtain detailed images of the heart structure and function.