1. HEART Alexis Reynolds & Calli Singer

2. PARTS OF THE HEART

3. BLOOD MOVING THRU THE HEART

4. DIAGRAM OF AN EKG(ELECTROCARDIOGRAM)

5. VOCABULARY  Depolarization: When a nerve impulse stimulates ion channels to open, positive ions flow into the cell and cause depolarization, which leads to muscle cell contraction.Depolarization:  Fibrillation: Very rapid irregular contractions of the muscle fibers of the heart resulting in a lack of synchronism between heartbeat and pulse Fibrillation:

6. VOCABULARY CONTINUE  SA Node: Heart natural pacemaker. consists of a cluster of cells that are situated in the upper part of the wall of the right atrium (the right upper chamber of the heart).  Tachycardia: An abnormally rapid heart rate  Bradycardia: Abnormally slow heart action

7. QUESTIONS Name all the parts of the heart… Name the circulation of blood in the heart… What does ekg stand for? What does an ekg show you? What is depolarization?

8. CONT. QUESTIONS What is fibrillation? What is tachycardia? What is bradycardia? What is the SA node? What does the SA node consist of?