Respiratory system

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Across
  1. 3. Your ________ are bones that protect your lungs.
  2. 7. The ________ carries the air to your lungs. It is in your throat.
  3. 9. Your _____________ helps you breathe. It's red.
Down
  1. 1. You need _________ to live. It is in the air.
  2. 2. You __________ in your nose and mouth.
  3. 4. _________means to breathe IN oxygen.
  4. 5. _________ means to breathe OUT carbon dioxide.
  5. 6. Oxygen goes down to your __________ (There are two of them).
  6. 8. The lungs send oxygen to your ________.