The Respiratory System

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Across
  1. 2. a muscle between the chest and the abdomen
  2. 5. air passages inside the lungs.
  3. 6. it's also called your windpipe.
  4. 9. A part of your face above the mouth.
  5. 10. a network of tiny blood vessels
  6. 11. Otherwise known as O2
Down
  1. 1. the movement of molecules in a fluid
  2. 3. What allows us to breathe
  3. 4. tiny air sacs
  4. 5. any of the major air passages of the lungs
  5. 7. A curved bone attached to the spine.
  6. 8. dioxide known as Co2