Body systems

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Across
  1. 1. what organ removes waste?
  2. 4. what is the brain all connected by
  3. 6. what is the center of control for the nervous system?
  4. 13. what muscle helps move your shoulder?
  5. 14. what is the biggest part of the brain
  6. 16. what is movement of blood called?
  7. 18. smallest bone in the body
  8. 20. what system helps you breath?
Down
  1. 2. what muscle is in your digestive system?
  2. 3. what carries blood back to the heart?
  3. 5. another name for trachea is ______
  4. 7. what are the air sacs in your lungs called?
  5. 8. when you inhale your lungs ______
  6. 9. what controls blood flow in the heart?
  7. 10. what connects bones and muscles?
  8. 11. the nines in your back
  9. 12. the bone that protects your skull
  10. 15. bones that protect the heart and lungs
  11. 17. what muscle pumps blood?
  12. 19. how many pounds does a brain weigh?