Biology Form 4 Chapter 8

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Across
  1. 3. The process that occurs when oxygen moves from the lung to the blood vessels is called __________
  2. 6. When we expel the air the diaphragm muscle will __________
  3. 7. The drawing in of breath; inhalation
  4. 9. What is the site of gas exchange?
  5. 11. Breathing out; exhalation of breath.
Down
  1. 1. Animals need oxygen to _______ _______ for energy
  2. 2. Lung is protected by _________
  3. 4. A chamber behind the nose and mouth that leads to the trachea
  4. 5. _________ is the process of taking oxygen into the body and releasing carbon dioxide back into the environment.
  5. 8. The only externally visible part of the respiratory system
  6. 10. What part of the Respiratory System plays a major role in speech