Body System

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Across
  1. 2. -The group of bones that protect your heart and lungs
  2. 4. tiny air sacs in the lungs
  3. 5. flap that prevents food from entering the windpipe.
  4. 7. -Insulin-producing organ
  5. 9. -the starting point of digestion
  6. 10. the longest bone in your body
  7. 12. -Organ that helps you breathe
  8. 14. -Tube that carries air to the lungs
  9. 15. -Backbone’s other name
Down
  1. 1. -Organ that pumps blood
  2. 3. -Organ that helps you think and feel
  3. 6. -The system that helps you move your body
  4. 8. -Vessel that carry oxygen-rich blood from the heart
  5. 11. -a dome-shaped muscle that contracts and relaxes to allow breathing
  6. 13. -Nerve cells that send and receive messages