Circulation and Respiration

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Across
  1. 5. cell that contains a nucleus and destroys invading microbes
  2. 6. cells that initiate blood clotting and do not have a nucleus
  3. 9. The upper chambers of the heart. Receives blood from the body and the lungs
  4. 11. A flap that prevents food from entering the trachea
  5. 12. The waste product given off in the gas exchange between air and blood in the alveoli
  6. 13. cell that delivers oxygen throughout the body
  7. 18. The system that transports nutrients, wastes, and chemical messengers throughout the body
  8. 19. The element that we need to live
  9. 20. Air filled sacs covered by capillaries and is the site of gas exchange
  10. 21. Blood vessel that carry blood from the body cells back to the heart
Down
  1. 1. Wind pipe that is lined with cartilaginous rings, cilia, and mucus. It is covered by the epiglottis
  2. 2. Tiny blood vessels that connect arteries and veins. Smallest blood vessels in the circulatory system
  3. 3. A strong muscle that contracts and relaxes to move air in and out of the lungs
  4. 4. Branches from the bronchi. Branch and re-branch into small vessels
  5. 7. C6H12O6+O2=CO2+H2O
  6. 8. All processes that supply oxygen to the cells of the body for the breakdown of glucose and the elimination of waste (CO2)
  7. 10. The lower chambers of the heart. Pump blood out of the heart
  8. 14. Movement of particles from an area of high concentration to an area of low concentration
  9. 15. The respiratory organ which takes in and releases air
  10. 16. Two tube like structures branching from the trachea
  11. 17. Blood vessels that carry blood away from the heart