YR 10 Transport in animals

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Across
  1. 6. Cell fragment that triggers the conversion of fibrinogen to fibrin in clotting.
  2. 7. Compound formed when oxygen binds to haemoglobin in red blood cells.
  3. 12. Ensures blood flows in one direction through the heart and veins.
  4. 17. Passive movement of molecules from high to low concentration.
  5. 18. Protein produced by lymphocytes that binds to antigens.
  6. 20. Blood passes through the heart twice during one full circuit of the body.
  7. 21. Help maintain osmotic balance and transport substances in the blood.
  8. 22. Narrow vessel with walls one cell thick for efficient exchange of substances.
  9. 25. Lower chambers of the heart that contract to pump blood out.
  10. 27. Fluid formed from plasma that bathes body cells for exchange.
  11. 28. Transports dissolved substances including carbon dioxide, urea, hormones, and heat.
  12. 29. Divides the left and right sides of the heart to keep blood separated.
Down
  1. 1. Carries deoxygenated blood from the heart to the lungs.
  2. 2. Fights infection by engulfing pathogens or producing antibodies.
  3. 3. Produces antibodies to attack specific pathogens.
  4. 4. Thick muscular vessel that carries blood away from the heart under high pressure.
  5. 5. The pressure exerted by blood against the walls of arteries.
  6. 8. Iron-based molecule in red blood cells that binds oxygen.
  7. 9. Major vein that brings deoxygenated blood from the body to the heart.
  8. 10. Returns blood to the heart; contains valves to prevent backflow.
  9. 11. Carries oxygenated blood from the lungs to the heart.
  10. 13. Upper chambers of the heart that receive incoming blood.
  11. 14. Supply the heart muscle with oxygenated blood for respiration.
  12. 15. Carries oxygen using haemoglobin; has no nucleus to maximise space.
  13. 16. Blood that has delivered oxygen to tissues and collected carbon dioxide.
  14. 19. Largest artery; carries oxygenated blood from the left ventricle to the body.
  15. 23. A substance on a pathogen that triggers an immune response.
  16. 24. Expansion and recoil of an artery as blood is forced through by the heart.
  17. 26. The central cavity inside a blood vessel through which blood flows.
  18. 28. Type of white blood cell that engulfs and digests pathogens.