Cardiovascular System Crossword Puzzle

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Across
  1. 5. disk-shaped red blood cell
  2. 6. a thin, smooth tissue that makes up the lining of the chambers and valves of the heart
  3. 8. the heart's lower chambers
  4. 10. the middle, muscular layer of the heart wall, responsible for the heart's pumping action
  5. 11. the smallest blood vessels in the circulatory system
  6. 13. the two upper chambers of the heart
  7. 14. carry oxygen-rich blood away from the heart to the rest of the body
Down
  1. 1. platelet
  2. 2. white blood cells
  3. 3. keeps the heart in a stable location in the mediastinum
  4. 4. carry deoxygenated blood back to the heart
  5. 7. blood vessels that carry oxygen-poor blood from the right side of your heart to your lungs
  6. 8. carries blood to the heart
  7. 9. blood vessels that carry oxygen-rich blood from your lungs to your heart
  8. 12. the first and largest artery in the body