Respiratory System Review

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Across
  1. 3. Breathing in.
  2. 8. The two "branches" leading into the lungs.
  3. 9. Breathing out.
  4. 11. The diaphragm is a dome-shaped _____ that drives breathing.
  5. 13. The part of the respiratory system that has rings of cartilage that give it structure and hold it open.
  6. 14. Also known as breathing.
  7. 17. An organ made out of spongy tissue. You have two.
  8. 18. _____ has a lower concentration in the alveoli than in the capillaries surrounding the alveoli.
  9. 20. In diffusion, particles move from _____ to _____ concentration. (Write both words together without a space.)
  10. 21. Bones that protect the lungs/chest cavity.
  11. 22. How thick are alveolar walls?
Down
  1. 1. The end point for air when you inhale.
  2. 2. The sticky substance that traps particles like pollen, dust, and bacteria.
  3. 4. Folds of tissue that stretch and vibrate to produce sound.
  4. 5. The part of the respiratory system that food also passes through.
  5. 6. The nasal cavity moistens and _____ air.
  6. 7. We exhale CO2 and _____.
  7. 10. Also known as the "voicebox."
  8. 12. Hair-like projections found everywhere in the respiratory system except the alveoli.
  9. 15. Cellular respiration requires this material and oxygen.
  10. 16. The purpose of cellular respiration is to make _____.
  11. 19. _____ has a higher concentration in the alveoli than in the capillaries surrounding the alveoli.