Respiratory System

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Across
  1. 1. Where gaseous exchange takes place.
  2. 3. The number of times we breathe in one minute
  3. 5. To conditions the inhaled air to be warmer before entering the lungs.
  4. 7. A process which releases energy from the food we eat.
  5. 8. The part that connecting the nose and the lungs.
  6. 9. Several people are trapped in a lift for some time. There is no fresh air entering the lift during this period of time. The amount of_____will decrease
Down
  1. 2. Limewater can be used to test the presence of ________ in the air.
  2. 4. When we exercise, our breathing rate_____
  3. 6. The system of our body that help us to breathe