JC Elementary School - Respiratory System

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Across
  1. 2. The Diaphragm __________ when humans breath in.
  2. 6. What do we breath in?
  3. 7. The Diaphragm ___________ when humans breath out.
  4. 10. What is the windpipe called?
  5. 11. What is a sticky substance that collects germs?
Down
  1. 1. Dioxide What do we breath out?
  2. 3. Where do humans get oxygen?
  3. 4. How many lung(s) do humans have?
  4. 5. Which organ is responsible for helping humans breath
  5. 8. The air enters into humans through the ________.
  6. 9. What are the two tubes called?