Respiratory System

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Across
  1. 2. The lungs are broken into _________ parts
  2. 4. A substance that warms and moistens the air as well as trapping foreign objects Pharynx Located at the back of the nose and mouth and carries both food and air
  3. 5. Internal respiration is when gasses are exchanged between __________________ and blood.
  4. 6. Bone structure which protects the heart and lungs
  5. 12. The process of which a substance moves from a high concentration to a low concentration
  6. 13. External respiration is when gasses are exchanged between the _________________ and blood.
  7. 15. Letting air out of the lungs
  8. 17. When your diaphragm does this, you breathe in.
  9. 19. Main organ of the respiratory system
  10. 20. Tube which leads from trachea to each lung
Down
  1. 1. When your diaphragm does this, you breathe out.
  2. 3. Structure that branches off of the two bronchi into smaller parts.
  3. 7. Filters air we inhale and branches into the bronchi
  4. 8. Tiny sacs within the lungs where gaseous exchange occurs
  5. 9. Tiny hairs which move in a wavelike motion to remove dust and dirt
  6. 10. Muscle located under the lungs
  7. 11. Taking air into the lungs
  8. 14. _____________ involves the movement of air.
  9. 16. Otherwise known as the voice box
  10. 18. The __________ allows the lungs to move easily during ventilation