cardivascular system 1

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Across
  1. 2. abnormal swishing sound caused by improper closure of the heart valves
  2. 6. valve between the left atrium and the left ventricle; bicuspid valve
  3. 9. gas (waste) released by the body cells, transported via veins to the heart, and then to the lungs for exhalation
  4. 11. smallest blood vessel. Materials pass to and from the bloodstream through the thin capillary walls
  5. 13. largest type of blood vessel; carries blood away from the heart to all parts of the body
  6. 14. small artery
  7. 15. gas that enters the blood through the lungs and travels to the heart to be pumped via arteries to all body cells
  8. 16. specialized nervous tissue in the right atrium that begins the heartbeat. An artificial cardiac pacemaker is an electronic apparatus implanted in the chest to stimulate heart muscle that is weak and not functioning
Down
  1. 1. vein
  2. 3. beat of the heart as felt through the walls of the arteries
  3. 4. largest vein in the body. The superior and inferior venae cavae return blood to the right atrium of the heart
  4. 5. artery carrying oxygen-poor blood from the heart to the lungs
  5. 7. thin-walled vessel that carries blood from body tissues and lungs back to the heart. Veins contain valves to prevent backflow of blood
  6. 8. relaxation phase of the heartbeat
  7. 10. largest artery in the body
  8. 12. contraction phase of the heartbeat