crossword

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Across
  1. 5. Produces electrical impulses to spead throught the heart
  2. 6. Attracts oxygen in red blood cells
  3. 7. A type of mammal where the fetus is almost fully developed before birth
  4. 8. Required in photosynthesis
  5. 10. C_________ System
  6. 11. Food chemical after digestion of protein
  7. 14. Similar to bone in the teeth
  8. 15. The powerhouse of a cell
  9. 18. Stops blood from going the wrong way in veins
  10. 20. Makes up a layer near the top surface of a leaf
  11. 25. In the nucleus
  12. 26. Gives plants the 'green' colour
  13. 28. Released during digestion
  14. 30. The most numerous type of blood vessels
  15. 33. Animals, Plants, Fungi, Monera & _____
  16. 34. Big organelle in plant cells
  17. 36. Act as a filter which removes all unwanted wastes from the body
  18. 37. A type of excretion
  19. 38. Small openings under a leaf
Down
  1. 1. This is created during photosynthesis
  2. 2. The condition when there is insufficient supply of oxygen
  3. 3. Where red blood cells are produced
  4. 4. Where does the vena cava lead to
  5. 6. Another word for blood pressure
  6. 8. Janssen Brothers who invented the first compound microscope
  7. 9. Muscles that make up the heart
  8. 10. Holds the tooth in its socket
  9. 12. This connects the kidneys to the bladder
  10. 13. How many times does your body breathe a day
  11. 16. What forms tissue
  12. 17. Water is absorbed through this during photosynthesis
  13. 19. Carries deoxygenated blood to the heart
  14. 21. Another word for consumers
  15. 22. Type of blood pressure when the heart contracts
  16. 23. Cells found in the stems of plants
  17. 24. An organ of the Excretory System
  18. 27. Leaves turn dark blue or purple if in contact with iodine when covered from the sun
  19. 29. Always carries blood away from the heart
  20. 31. Helps blood to clot
  21. 32. Another word for producers
  22. 34. Always carries blood to the heart
  23. 35. What are the little hairs in the nostrils