The Respiratory System

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Across
  1. 4. When this organ moves down air is drawn into the lungs
  2. 6. The smaller branches that divide the nose and the mouth
  3. 7. Also known as the voice box
  4. 8. Where air is drawn moistened and filtered
Down
  1. 1. A flap of cartilage behind the root of the tongue which is depressed during swallowing to cover the opening of the windpipe
  2. 2. Reinforced by rings of cartilage extending from the larynx to the bronchial tubes and taking air to and from the lungs
  3. 3. Where oxygen and carbon dioxide is diffused into the bloodstream
  4. 5. Located at the back of the nose and mouth
  5. 6. The major air passages of the lungs which diverge from the windpipe
  6. 7. Set of organs in the rib cage with branching passages where air is inhaled and exhaled