Breathing and Circulation

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Across
  1. 2. Blood vessel that carries blood to the heart
  2. 6. Organs for breathing
  3. 9. One of the functions of the blood
  4. 10. Sugar that is carried in the plasma
  5. 12. Platelets carry substances that help this occur
  6. 14. Tiny, thin-walled blood vessel that collects carbon dioxide from body cells.
  7. 15. Tiny air sacs that are the site of gas exchange in the lungs
  8. 19. Flat sheet of muscle that has a role in the breathing mechanism
  9. 20. Pumps blood around the body
Down
  1. 1. Bones that protect our heart and lungs
  2. 3. Chamber of the heart that blood flows into
  3. 4. Colour of blood cells that fight infection
  4. 5. Pressure wave that travels along the walls of the arteries each time the heart beats
  5. 7. Mineral needed for haemoglobin to function properly
  6. 8. Chemical that binds oxygen in the blood
  7. 11. Causes increase in heart rate
  8. 13. Liquid part of the blood
  9. 15. Blood vessel that carries blood away from the heart
  10. 16. Prevents backflow of blood in the circulatory system
  11. 17. Gas that diffuses from the blood in capillaries to the body cells
  12. 18. Carries air from the mouth to the bronchi
  13. 21. Colour of blood cells that carry oxygen