Respiratory system

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Across
  1. 3. These are the large tubes that join the lungs to the trachea
  2. 6. This is the windpipe that joints the mouth and nose to the large tubes of the lungs
  3. 8. The two main spongy organs of the respiratory system
  4. 10. This small tissue found near the throat separates the windpipe from the oesophagus and stops food from going into the windpipe
  5. 11. At the alveoli, gas _________ takes place
  6. 13. The alveoli are surrounded by these small blood vessels
Down
  1. 1. This is the important gas that we need to breathe in
  2. 2. dioxide This is the waste gas that we breathe out
  3. 4. The nose is filled with hair-like structures called ______ which are meant to trap any small particles that are inhaled
  4. 5. This is the process that takes place when we breathe in
  5. 7. This is the muscle found below the lungs that contract or expand to help the lungs inflate or deflate with air
  6. 9. These are the much smaller tubes that connect the large tubes with the air sacs
  7. 12. The lungs contain millions of these air sacs
  8. 14. This is the process that takes place when we breathe out