Science Revision Crossword

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Across
  1. 2. Longest bone in the human body.
  2. 4. Small air sacks in the lungs.
  3. 6. A cell that lies within a fully formed bone.
  4. 8. The level between cells and organs.
  5. 9. Flexible tissue for interior bones.
  6. 11. Blood vessels that carry blood towards the heart.
  7. 12. Small things that make up an organism.
  8. 14. Organ that filters your blood.
  9. 15. The food travels through and breaks down.
  10. 17. Windpipe
  11. 19. Another word for a voice box.
  12. 20. Main organ in the circulatory system.
Down
  1. 1. An organ that is part of the digestive and respitary system.
  2. 3. The powerhouse of a cell.
  3. 5. Solid that protect your organs.
  4. 7. Main organ of the digestive system.
  5. 10. Allows blood to enter the heart.
  6. 13. Blood vessels that carry blood away from the heart.
  7. 16. A carbohydrate that contains lots of glucose.
  8. 18. Small hairs that filter the air.