Y7 Living Systems

12345678910111213141516171819202122
Across
  1. 2. Gas needed for aerobic respiration
  2. 4. Smallest part of any living thing
  3. 7. Substance needed for a chemical reaction to happen
  4. 9. Device used in the lab to look at very small things
  5. 10. Type of unicellular organism that surrounds and digests its food
  6. 13. Sheet of muscle under the lungs that helps with breathing
  7. 15. Piece of glass used to display objects under the microscope
  8. 16. Tiny bag in the lung that increases the lung's surface area
  9. 18. One of the bones surrounding the thorax
  10. 19. Breathe in
  11. 21. Many similar cells joined together
  12. 22. Colour of blood cell that has no nucleus
Down
  1. 1. All cells have one of these surrounding the cytoplasm
  2. 3. Main organ in the circulatory system
  3. 5. Green part that helps a plant cell to make food
  4. 6. Hole filled with liquid, found in many cells
  5. 8. Surface area _______ volume = surface area to volume ratio
  6. 11. Main organ of the nervous system
  7. 12. Plant cells are surrounded by a cell ______
  8. 14. This part controls the cell
  9. 17. Living thing
  10. 20. Cells respire in order to release this