Circulatory and Respiratory System

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Across
  1. 5. A dome shaped muscle under lungs, contracts and relaxes when you inhale and exhale
  2. 9. Takes blood to the heart
  3. 10. Covering that protects trachea from food
  4. 13. Word associated with lungs
  5. 15. The largest artery that carries oxygen rich blood to the body
  6. 16. Component of blood involved in clotting
  7. 18. Open and close to stop backflow
  8. 19. The __________ are a single-cell-thick blood vessel
  9. 20. Two tubes that branch from the Trachea
  10. 21. The top chambers in the heart
Down
  1. 1. A long tube where air moves freely
  2. 2. Area where nasal and oral cavities meet
  3. 3. Process that allows gases to exchange between alveoli and capillaries
  4. 4. Smaller tubes that branch from the Bronchi
  5. 6. The lower chambers of the heart
  6. 7. The largest vein(s) that carry oxygen poor blood to the heart
  7. 8. hair-like projections that help filter air moving through the respiratory track
  8. 11. Circulation that involves blood moving from the heart to the body back to the heart
  9. 12. Liquid component of blood
  10. 14. At the end of Bronchioles and where O2 and CO2 exchange is the __________
  11. 17. Takes blood away from the heart