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Lab #5 - Sylwester Czado BIO 244 Lab#5 TA Shannon Gerry...

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Sylwester Czado 10-18-07 BIO 244, Lab #5 TA: Shannon Gerry Cardiovascular Effects of Exercise Worksheet 1. An EKG measures heart rate over a period of time. 2. EKG Graph: 3. The R-R interval measures the time between heart beats (between QRS peaks). 4. The P-wave represents atrial depolarization. 5. The QRS complex represents ventricular depolarization. 6. The T-wave represents ventricular repolarization. 7. Three heart conditions are arrhythmia, myocardial infarction, and ischemic heart disease. 8. Path of blood through the heart: 1. Blood LOW IN OXYGEN ( “deoxygenated” ) enters the RIGHT ATRIUM through the SUPERIOR ( top ) and INFERIOR ( bottom ) VENAE CAVAE , the body's largest veins. 2. The RIGHT ATRIUM contracts, forcing blood through the TRICUSPID VALVE and into the RIGHT VENTRICLE . 3. The right ventricle contracts, sending blood through the PULMONARY SEMILUNAR VALVE and into the PULMONARY TRUNK . 4. The pulmonary trunk divides into PULMONARY ARTERIES , which take the deoxygenated blood to the capillaries of the LUNGS .
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