Human body

1234567891011121314151617181920
Across
  1. 5. what color blood cells fight infection
  2. 6. removes old or damaged red blood cells
  3. 8. move in a circle, returning to the same point
  4. 11. chemicals made by white blood cells that bind to a specific antigen
  5. 12. this system fights infections from bacteria, viruses and fungi
  6. 13. the yellowish, fluid part of the blood
  7. 16. collects in the arteries and limits the blood flow
  8. 18. the body's pump
  9. 19. what color blood cells carry oxygen
  10. 20. this is where the blood cells deposit carbon dioxide
Down
  1. 1. simple, one-celled microscopic organisms
  2. 2. first defense against ingested or inhaled pollutants
  3. 3. connect veins to the arteries
  4. 4. the heart is the size or your _______
  5. 7. these assist with blood clotting
  6. 9. a disease that spreads rapidly in a particular area and makes many people sick
  7. 10. an infectious organism that reproduces within the cells of an infected host
  8. 14. system that helps with the body's immune system
  9. 15. return blood to the heart
  10. 17. carry blood away from the heart
  11. 20. colorless liquid that flows through the lymphatic system