The Respiratory System

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Across
  1. 2. your________ goes up and down when you breathe
  2. 4. what do you breathe out?
  3. 7. smaller airways in the lungs
  4. 8. tube that connects to your lungs
  5. 10. where you breathe in from
  6. 11. tiny blood vessels where gas exchange happens
Down
  1. 1. process where oxygen and carbon dioxide exchange through cell membranes
  2. 3. main organs for breathing
  3. 5. what do you breathe in?
  4. 6. where the carbon dioxide and oxygen exchange
  5. 7. asthma mostly effects the ________
  6. 9. the set of bones protecting your lungs