circulatory and respiratory systems

12345678910111213
Across
  1. 3. a sheet like muscle beneath the lungs
  2. 5. a small blood vessel that connects arteries to veins
  3. 6. cell fragment that helps form blood clots
  4. 10. a blood vessel that pumps blood to the heart
  5. 11. upper chamber of the heart
  6. 12. a lower chamber of the heart
  7. 13. a tube that transports air to the lungs
Down
  1. 1. a muscular organ that pumps blood
  2. 2. a pair of tubes that branch of the trachea
  3. 4. a blood vessel that pumps blood from heart
  4. 6. a yellow fluid in which blood is suspended
  5. 7. air sacs within the lungs
  6. 8. the main organ in the respiratory system
  7. 9. cells of the circulatory system that fights disease