RESPIRATORY SYSTEM

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Across
  1. 2. the two pinky spongy bags in our chest cavity
  2. 5. The process of taking in air using oxygen to make energy
  3. 7. another name for windpipe
  4. 8. the sticky substance secreted inside the nose which prevents the entry of dust and germs in the body
  5. 9. The process of throwing out carbon dioxide
  6. 10. breathing polluted air causes serious lung disease
  7. 11. lungs contain blood _______________ which help in exchange of gases
Down
  1. 1. the process of taking in oxygen and giving out carbon dioxide is called
  2. 3. the largest muscle in the body which contracts to make space for expanded lungs
  3. 4. the tiny air sacs which are exchange point of gases
  4. 6. the windpipe divides into 2 tubes called
  5. 8. an adult breathes 12 to 14 times in a single ___________