Circulatory/Respiratory System Crossword

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Across
  1. 2. Clusters of tiny, thin-walled sacs where the exchange of oxygen and carbon dioxide takes place
  2. 4. A tube supported by C-shaped rings of cartilage
  3. 5. Lower chambers of the heart
  4. 10. Tubelike passageway used for food, liquid, and air
  5. 11. Irregularly shaped cell fragments that help clot blood
  6. 14. The flow of oxygen-rich blood to all of your organs and body tissues, except the heart and lungs
  7. 15. Upper chambers of the heart
  8. 18. Carry blood Away from the heart
  9. 19. A molecule that carries oxygen and carbon dioxide
Down
  1. 1. The flow of blood through the heart to lungs and back to the heart
  2. 3. The flow of blood to and from the tissue of the heart
  3. 6. Channels that carry blood throughout your body
  4. 7. Carry blood Back To the heart
  5. 8. The organ that controls blood flow through each section
  6. 9. The liquid part of blood-is mostly water
  7. 12. Masses of alveoli arranged in grapelike clusters
  8. 13. Connect arteries and veins
  9. 16. The airway where the vocal cords are attached
  10. 17. Two short tubes from the Trachea that carry into the lungs