Circulatory System Crossword Puzzle

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Across
  1. 3. – A tube that carries blood back to the heart.
  2. 5. – A “door” inside your heart or veins that keeps blood flowing the right way.
  3. 9. – A tube that carries blood away from the heart.
  4. 10. – Blood that has used up oxygen and carries carbon dioxide instead.
  5. 11. – Good things from food that your body uses for energy and growth.
  6. 13. – The pair of organs that take in oxygen and get rid of carbon dioxide.
  7. 15. system – The system of heart, blood, and vessels that moves blood all over your body.
  8. 18. cage – The bones around your chest that protect your heart and lungs.
  9. 20. dioxide – A gas your body makes and breathes out as waste.
  10. 22. – A tiny part of your blood that helps stop bleeding by making clots.
  11. 23. – The sticky stuff in your nose and throat that traps dust and germs.
  12. 26. pressure – How hard your blood pushes against the walls of your blood vessels.
  13. 28. blood cell – Cells in your blood that fight germs and keep you healthy.
  14. 29. circulation – The path blood takes from your heart to your body and back.
  15. 30. – The watery part of your blood that carries cells and food.
  16. 34. diet – Eating good foods that help your body grow and work well.
  17. 35. – When germs get inside your body and make you sick.
  18. 37. system – The group of organs that help you breathe in oxygen and breathe out carbon dioxide.
  19. 39. – Blood full of oxygen that your body uses for energy.
  20. 40. – Tiny living things that can cause sickness.
Down
  1. 1. – Tiny blood vessels that connect arteries and veins.
  2. 2. artery – The blood vessel that takes blood from the heart to the lungs.
  3. 4. – Time when your body is still so it can heal and grow.
  4. 6. – Tiny air pockets in your lungs where oxygen goes into the blood.
  5. 7. – The muscle that pumps blood all around your body.
  6. 8. – A flap in your throat that stops food or drink from going into your windpipe.
  7. 12. – The windpipe; the tube that moves air from your throat to your lungs.
  8. 14. – Tiny hairs in your airways that move dust and germs out of your lungs.
  9. 16. system – Your body’s way of fighting germs to keep you healthy.
  10. 17. – A gas you breathe in that your body needs to live.
  11. 19. – Moving your body to stay healthy and keep your heart and lungs strong.
  12. 21. vessel – A tube that carries blood through your body (arteries and veins).
  13. 24. – A thick patch of blood that stops bleeding when you get hurt.
  14. 25. box – The part of your throat that helps you make sounds and talk.
  15. 27. bones – The ribs and sternum that protect your lungs and heart.
  16. 31. – The biggest artery that carries blood from your heart to the rest of your body.
  17. 32. circulation – The path blood takes from your heart to your lungs and back.
  18. 33. – Two tubes that carry air from the trachea into each lung.
  19. 36. – A muscle below your lungs that helps you breathe in and out.
  20. 38. blood cell – A blood cell that carries oxygen to your body.