Biology revision crossword

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Across
  1. 2. Becomes the seed after fertilisation
  2. 4. Removal of metabolic waste (e.g. urea, CO₂)
  3. 9. Helps in blood clotting
  4. 10. Maintains uterus lining; inhibits LH and FSH
  5. 13. Site of aerobic respiration
  6. 14. Triggers ovulation
  7. 16. Functional unit of the kidney
  8. 19. Filtering of blood at high pressure
  9. 20. Site of exchange between blood and cells
  10. 23. Biological catalyst that speeds up reactions
  11. 24. Receives pollen
  12. 27. Process that restores conditions to normal when they change
  13. 29. Diffusion of water across a partially permeable membrane
  14. 30. Movement of substances against a concentration gradient using energy
  15. 34. Carries blood to the heart; has valves
  16. 35. Destroys pathogens; part of the immune system
  17. 38. Green pigment that absorbs light for photosynthesis
  18. 39. Repairs uterus lining; stimulates LH, inhibits FSH
  19. 40. Hormone that lowers blood glucose
  20. 42. Bodily response to danger, triggered by adrenaline
  21. 43. Transports water and minerals
  22. 44. Controls the movement of substances in and out of the cell
  23. 45. Hormone that raises blood glucose
  24. 47. Produces insulin and glucagon
  25. 48. Control opening and closing of stomata
Down
  1. 1. Maintaining a stable internal environment
  2. 3. Waste product from breakdown of amino acids
  3. 5. Becomes the fruit in plants
  4. 6. Transports oxygen; contains hemoglobin
  5. 7. Where ADH acts to control water reabsorption
  6. 8. Reabsorption of useful substances like glucose
  7. 11. Carries blood away from the heart under high pressure
  8. 12. Process where plants make glucose using sunlight, CO₂, and water
  9. 15. Release of egg from ovary
  10. 17. Filters blood to form urine
  11. 18. Transports sugars
  12. 21. (plant) Fusion of male and female gametes in ovule
  13. 22. Contains DNA; controls the cell's activities
  14. 25. Hormone released during stress; increases heart rate and glucose levels
  15. 26. Pores for gas exchange in leaves
  16. 28. Tissue with air spaces to aid gas diffusion
  17. 31. Site of protein synthesis
  18. 32. Controls water reabsorption in kidneys
  19. 33. Transfer of pollen from anther to stigma
  20. 36. Net movement of particles from high to low concentration
  21. 37. Shedding of uterine lining
  22. 41. Liquid part of blood that carries substances
  23. 42. Stimulates egg development
  24. 44. Site of most chemical reactions
  25. 46. Produces pollen