Circulatory System

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Across
  1. 3. A flap that keeps blood flowing in the correct direction.
  2. 5. The continuous movement of blood through the body.
  3. 8. The smallest blood vessel where gases and nutrients are exchanged.
  4. 9. A gas carried by the blood that cells need to survive.
  5. 10. The liquid part of blood that carries cells and nutrients.
  6. 12. The liquid that transports oxygen and nutrients throughout the body.
  7. 14. The wall that separates the left and right sides of the heart.
  8. 16. A blood vessel that carries blood back to the heart.
  9. 18. Upper chamber of the heart that receives blood.
  10. 19. The muscular organ that pumps blood throughout the body.
Down
  1. 1. A blood cell that helps protect the body from infections.
  2. 2. The regular pumping action of the heart.
  3. 4. A blood cell that carries oxygen throughout the body.
  4. 6. A blood cell that helps stop bleeding by forming clots.
  5. 7. A waste gas carried by the blood to the lungs.
  6. 11. Blood vessel that carries blood away from the heart.
  7. 13. The rhythmic beating of an artery caused by the heartbeat.
  8. 15. The organ where blood picks up oxygen and releases carbon dioxide.
  9. 16. Lower chamber of the heart that pumps blood out.
  10. 17. The largest artery in the human body.