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Transcript
SVHS ADVANCED BIOLOGY 9th edition NAME: _____________________ PERIOD: 1 2 3 4 5 6 DIRECTED READING 15.1 – STRUCTURE OF HEART After reading pages 397-399 complete the following: 1. Describe what hypertension is: 2. What are the lifestyle risk factors for hypertension? a. d. b. c. 3. What are some ways to reduce the risk of hypertension? a. b. c. 4. The heart pumps ______________ times per day, ____________________beats per month. There is an estimated _____________________________ of blood vessels in the human body. Each minute the heart pumps __________ liters of blood and _______________ liters in a day. In a year the heart pumps ____________________ gallons of blood. 5. Describe the size, location, and position of the heart as it lies in the thoracic cavity. 6. Name the membrane that surrounds the heart. Name and describe the roles of the outer and inner pericardium. Inner pericardium = Outer pericardium = 7. Describe why it is essential to have pericardial fluid between the layers of pericardium. 8. Name and explain the role of each layer of the heart wall. a. b. c. 9 Intercalated discs are unique to heart muscle. Explain the location of the intercalated discs. 10. Explain where gap junctions occur and the role they play. 11. Explain what happens to a person who suffers from pericarditis. 12. Explain why the unborn baby must have a foramen ovale in the heart. 13. Label the structures of the heart. Label the intercalated discs, cell nuclei, and Striations.