CELLS

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Across
  1. 2. Different organs work together to form this.
  2. 4. The basic units of life
  3. 8. A device needed to observe small living things
  4. 9. This cell does not contain a nucleus.
  5. 12. Calcium and ______ help to keep our bones strong and healthy.
  6. 14. These cells can contract and relax.
  7. 15. Where a microscope slide is placed in a microscope
  8. 16. Bone cells help to _________ our body.
  9. 17. The cell membrane ______ substances entering and leaving the cell.
  10. 19. Red blood cells do not contain this.
  11. 20. Many cells make up a _______.
  12. 21. Information is passed from parents to children through ______.
Down
  1. 1. The nucleus contains these.
  2. 3. Blood is a _____ made up of different cells.
  3. 5. These cells contain calcium and phosphate.
  4. 6. The layer surrounding a cell
  5. 7. The part of the cell that controls all cell activities.
  6. 10. Muscle cells help the body to _____.
  7. 11. Contains water and food materials in a cell.
  8. 13. Various tissues work together to form this.
  9. 18. Red blood cells transport this around the body.