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Back Lesson Print Name Class Date Skills Worksheet Directed Reading A Section: The Cardiovascular System 1. The heart, blood, arteries, veins, capillaries, and lymphatic system make up the . YOUR CARDIOVASCULAR SYSTEM 2. The heart and three types of blood vessels together make up the . 3. The word cardio means . 4. The word vascular means . 5. Arteries, veins, and capillaries are that carry blood throughout the body. THE HEART ______ 6. What kind of tissue makes up most of the heart? a. vascular c. circulatory b. cardiac d. lymphatic ______ 7. Each upper chamber of the heart is called a(n) a. atrium. c. valve. b. ventricle. d. cardio. ______ 8. Each lower chamber of the heart is called a(n) a. atrium. c. valve. b. ventricle. d. cardio. ______ 9. The right side of the heart pumps oxygen-poor blood to the a. body. c. right ventricle. b. lungs. d. left atrium. ______10. The left side of the heart pumps oxygen-rich blood to the a. body. c. right ventricle. b. lungs. d. left atrium. ______11. When atria relax, what do ventricles do? a. expand b. relax c. contract d. close Copyright © by Holt, Rinehart and Winston. All rights reserved. Holt Science and Technology 1 Circulation and Respiration Back Lesson Print Name Class Date Directed Reading A continued 12. Why do the heart’s valves close? 13. What part of the heart makes the “heartbeat” sound? BLOOD VESSELS Match the correct definition with the correct term. Write the letter in the space provided. 14. carries blood back to the heart a. artery 15. allows exchanges between blood and body cells b. blood pressure 16. carries blood away from the heart c. pulse 17. is pressure caused by heartbeats d. capillary 18. is caused by a rhythmic change in blood pressure e. vein 19. What is the narrowest kind of blood vessel? 20. What kind of blood vessels are helped by the contracting of skeletal muscles? 21. What kind of blood vessels stretch due to blood pressure? TWO TYPES OF CIRCULATION ______22. What is added to blood when it is pumped to the lungs? a. blood vessels b. capillaries c. oxygen d. carbon dioxide ______23. What is taken from blood when it is pumped to the lungs? a. blood vessels b. capillaries c. oxygen d. carbon dioxide Copyright © by Holt, Rinehart and Winston. All rights reserved. Holt Science and Technology 2 Circulation and Respiration Back Lesson Print Name Class Date Directed Reading A continued ______24. Where does the exchange of blood and oxygen take place in the lungs? a. cells b. arteries c. capillaries d. veins 25. The flow of blood between the heart to the lungs is circulation. 26. The flow of blood between the heart and the rest of the body is circulation. CARDIOVASCULAR PROBLEMS 27. Cardiovascular problems can harm the whole 28. A healthy diet and plenty of . can reduce the risk of cardiovascular problems. 29. What are the leading causes of death in the United States? Match the correct description with the correct term. Write the letter in the space provided. Some terms will not be used. a. blood poisoning ______30. fatty buildup in blood vessels ______31. abnormally high blood pressure b. heart failure c. heart attack ______32. brain damage caused by damage to blood vessels d. atherosclerosis ______33. condition caused by the death of heart muscle cells f. hypertension e. stroke 34. What can happen when blood supply to the heart is blocked? Copyright © by Holt, Rinehart and Winston. All rights reserved. Holt Science and Technology 3 Circulation and Respiration Back Lesson Print PAGE TEACHER RESOURCE Answer Key Directed Reading A 7. destroy pathogens and help clean wounds viruses antibodies white blood cells temperature enlarge B when the ventricles contract when the ventricles relax heart and kidney D B They react as if the antigens were pathogens. 20. O 21. lost blood SECTION: THE CARDIOVASCULAR SYSTEM 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 32. 33. 34. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. circulatory system cardiovascular system heart blood vessel blood vessels B A B B A C to prevent blood from flowing backward the valves E D A B C a capillary veins arteries C D C pulmonary systemic body exercise heart diseases D F E C heart attack SECTION: THE LYMPHATIC SYSTEM 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. B pathogens lymph capillaries They are too large. lymph into the large neck veins A C A D B A C T cells spleen fighting infection; removing dead or damaged cells 17. produces, monitors, stores, and destroys 18. tonsils 19. infection SECTION: BLOOD SECTION: THE RESPIRATORY SYSTEM 1. 5 2. red blood cells, white blood cells, 1. 2. 3. 4. 5. 6. 7. platelets, plasma 3. plasma 4. carry oxygen and nutrients through the body 5. oxygen you inhale 6. platelets energy E A B F C D Copyright © by Holt, Rinehart and Winston. All rights reserved. Holt Science and Technology 94 Circulation and Respiration