The circulatory system & Gas Exchange

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Across
  1. 11. A feature that increases the rate of gas exchange
  2. 14. The wall of tissue that separates the left and right sides of the heart
  3. 15. A liquid tissue that transports oxygen, nutrients, and wastes
  4. 16. The movement of blood between the heart and the lungs
  5. 18. A blood vessel that carries blood towards the heart
  6. 20. The main artery that carries oxygenated blood from the left ventricle to the body
  7. 23. A waste gas produced during respiration
  8. 24. A feature that maintains a concentration gradient for gas exchange
  9. 27. A gas needed for respiration
  10. 28. The liquid part of blood that carries dissolved substances
  11. 30. Tiny air sacs in the lungs where oxygen and carbon dioxide are exchanged
  12. 31. The movement of particles from high to low concentration
  13. 33. A blood vessel that carries blood away from the heart
Down
  1. 1. A cell involved in defending the body against disease
  2. 2. Blood vessels that supply oxygenated blood to the heart muscle
  3. 3. The blood vessel that carries oxygenated blood from the lungs to the heart
  4. 4. The movement of air into and out of the lungs
  5. 5. The volume of blood pumped by the heart per minute
  6. 6. A cell that transports oxygen around the body
  7. 7. The force exerted by blood against the walls of blood vessels
  8. 8. A lower chamber of the heart that pumps blood out of the heart
  9. 9. The blood vessel that carries deoxygenated blood from the heart to the lungs
  10. 10. The process of moving air in and out of the lungs
  11. 12. A feature of alveoli that allows rapid diffusion
  12. 13. An upper chamber of the heart that receives blood returning to the heart
  13. 17. Organs where gas exchange takes place
  14. 19. A very small blood vessel where exchange of substances occurs
  15. 21. A protein in red blood cells that binds to oxygen
  16. 22. A structure that prevents the backflow of blood in the heart
  17. 25. A muscular organ that pumps blood around the body
  18. 26. The movement of blood between the heart and the rest of the body
  19. 29. A cell fragment involved in blood clotting
  20. 32. Specialized muscle tissue that contracts rhythmically to pump blood