Respiratory system -MM

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Across
  1. 2. area in the lungs where gas exchange occurs
  2. 4. the amount of air you breathe in and out as you breathe
  3. 5. instrument which measures the volume of air which you breathe in and out
  4. 7. tiny blood vessels which cover the alveoli
  5. 11. the number of breaths taken per minute
  6. 13. small flap of cartilage that stops food entering the windpipe
  7. 15. the amount of air which remains in the lungs
Down
  1. 1. flexible tube held open by rings of cartilage
  2. 3. the system responsible for breathing
  3. 6. taking air into the lungs
  4. 8. responsible for sounds which we make
  5. 9. pushing air out of the lungs
  6. 10. the air taken into the body during inspiration
  7. 12. muscles located between the ribs that help with respiration
  8. 14. where the lungs are located