Heart & Blood Circulation

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Across
  1. 3. transport oxygen from lungs to all respiring tissues. Prepare carbon dioxide for transport from all respiring tissues to lungs
  2. 8. produce antibodies
  3. 13. arrangement where blood passes through the heart twice for each complete circuit of the body.
  4. 15. the blood flows back towards from the heart in these vessels
  5. 16. receives oxygenated blood returning from lungs
  6. 17. the main artery of the body. Carries oxygenated blood out to the tissues. Blood pressure is at its highest here
  7. 18. remove any microorganisms that invade the body and might cause infection (engulfs the microorganism)
  8. 19. the main vein of the body. Returns deoxygenated blood at low pressure from the head and lower body
  9. 20. returns blood from kidneys to circulation. Blood has reduced urea concentration.
  10. 21. cell fragments involved in blood clotting
  11. 23. carries oxygenated blood to the liver
  12. 24. receives deoxgenated blood. The pacemaker is found here.
Down
  1. 1. an iron containing pigment which picks up oxygen at the lungs and lets go at the tissues
  2. 2. two flaps. When this valve is closed and the ventricle contracts the blood must leave through the aorta
  3. 4. carries oxygenated blood with high concentration of urea to the kidneys
  4. 5. wall between left and right side of heart. This separates oxygenated and deoxygenated blood.
  5. 6. the system of tube like vessels which blood flows around the body in
  6. 7. unlike other veins, returns oxygenated blood from the lungs. High oxygen and low carbon dioxide concentration.
  7. 9. these three flaps prevent blood flowing back from ventricle to atrium during contraction
  8. 10. unlike other arteries, carry deoxygenated blood to the lungs. Blood here has high oxygen concentration
  9. 11. the watery liquid which blood cells are suspended in
  10. 12. carries blood from the digestive system to the liver. Blood contains variable amounts of the absorbed products of digestion from the digestive system.
  11. 14. returns blood from liver to circulation with a regulated optimum concentration of food substances
  12. 22. the blood flows away from the heart in these vessels