Components of the Respiratory System!

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Across
  1. 2. The air passage that connects the nose and mouth to the lungs
  2. 6. A colorless, odorless gas that people and animals breathe out
  3. 8. Small, basic units of living matter
  4. 9. Something that is not solid or liquid and does not have a definite shape
Down
  1. 1. The smallest sections of your bronchial tubes
  2. 3. The strength to do active things without getting tired
  3. 4. Two airways that split from the trachea and enter the lungs
  4. 5. A colorless gas that people breathe; humans and animals need it to live
  5. 6. A small tube in your body that carries blood between the arteries and veins
  6. 7. The muscle under your lungs that moves as you breathe