The heart

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Across
  1. 3. one of the two upper chambers of the heart
  2. 4. the largest artery in the body
  3. 6. the bones that protect the heart and lungs
  4. 8. the body system that moves blood through the body
  5. 9. the fluid that carries oxygen, nutrients, and waste through the body
  6. 11. a blood vessel that carries blood towards the heart
  7. 12. a blood vessel that carrries blood away from the heart
  8. 14. a muscular organ that pumps blood throughout the body
  9. 15. the beat of the heart felt in the arteries
Down
  1. 1. the smallest blood vessel where gases and nutrients are exchanged
  2. 2. a gas carried away from the body to the lungs to be exhaled
  3. 5. the wall that seperates the left and right sides of the heart
  4. 7. a flap in the heart that keeps blodd from flowing backward
  5. 10. a gas carried by red blood cells to the body
  6. 13. one of the two lower chambers of the heart