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Cardiovascular System Internet Assignment Assignment # 1 http://science.nationalgeographic.com/science/health-and-human-body/humanbody/heart-article.html Click on the “Heart Attack” tab to access the passages. a. Summarize the four actions of the blockage of the artery. b. Summarize the four treatment options for a heart attack. Assignment # 2 – Cardiovascular System Questions 3. Choose terms from the list to complete the sentences below. atria; right hand side vena cava; ventricles atrioventricular valves a. b. c. d. e. f. g. pacemaker; pulmonary artery veins; arteries; left hand side aorta; coronary artery The top two chambers of the heart are called...................... These structures stop blood flowing backwards into the atria. This side of the heart receives oxygenated blood. This is the largest artery in the body. It carries blood to the brain and organs. These are blood vessels that carry blood towards the heart. This structure sets the speed of the heart beats. This blood vessel supplies the heart muscle with oxygenated blood? 4. Fill in the name of the blood vessel in the table below. Towards or Name of blood vessel Blood? Walls? away from heart a. ....................... Oxygenated Thin Towards b. ........................ Oxygenated Thick Away from c. ......................... Deoxygenated Thick Away from d. ......................... Deoxygenated Thin Towards 5. What is the odd one out? a) Right atrium, right ventricle, pulmonary artery, superior vena cava, aorta, b) Left atrium, left ventricle, right ventricle, pulmonary veins, aorta, coronary artery 6. Arrange these events in chronological order. _____ The left ventricle contracts and blood flows along the aorta to the body _____ The blood flows through the tricuspid valve into the right ventricle. _____ Oxygenated blood flows along the pulmonary veins into the left atrium. _____ The blood passes through the bicuspid valve into the left ventricle. _____ The left atrium contracts. _____Deoxygenated blood flows from the superior and inferior vena cavae into the right atrium. _____ The deoxygenated blood picks up oxygen. _____ The right atrium contracts. _____ The right ventricle contracts and blood flows along the pulmonary artery to the lungs. 7. The first heart sound is produced by: a) The semilunar valves closing b) The atrioventricular valves closing c) A hole in the heart d) Malfunction of the valves 8. The second heart sound is caused by: a) The semilunar valves closing b) The semilunar and atrioventricular valves closing c) The pacemaker d) The atrioventricular valves closing Assignment # 3 – Blood Pressure Questions 9. In what units is blood pressure expressed? 10. What is a pulse? 11. What is systolic pressure and what causes it? 12. What is ventricular systole? 13. What is diastolic pressure and what causes it? 14. What is ventricular diastole? 15. If the systolic pressure is 120 mm Hg and the diastolic pressure is 80 mm Hg, what would the pulse pressure be? 16. What two factors does cardiac output depend on? 17. Define heart rate. 18. What is the average heart rate in an adult at rest? 19. Define stroke volume.