The Cardiovascular System

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Across
  1. 4. _____ artery which carries the unoxygenated blood from the right ventricle to the lungs
  2. 5. A blood vessel that carries blood toward the heart
  3. 6. The largest artery of the body that carries oxygenated blood to the body
  4. 9. The filling of the heart in which blood moves from the atria to the ventricles
  5. 12. The gas transported by red blood cells in the blood
  6. 13. _____ valve that separates the left atrium and left ventricle
  7. 15. An upper chamber of the heart that receives blood
  8. 18. The organ that pumps blood throughout your body
  9. 19. _____ valve that separates the right atrium and right ventricle, also called the mitral valve
  10. 20. The liquid component of blood
  11. 21. The protein in red blood cells that binds to oxygen for transportation
  12. 22. The contraction of the heart in which the blood is pumped from the right ventricle to the pulmonary artery and the left ventricle to the body
  13. 24. The fluid-filled sac that surrounds the heart
Down
  1. 1. Superior and inferior veins that deliver deoxygenated blood to the heart
  2. 2. Sends electrical signals to the right and left ventricles
  3. 3. A blood vessel that carries blood away from the heart
  4. 7. The fluid that circulates through the body, delivering oxygen to cells
  5. 8. A lower chamber of the heart that pumps blood out of the heart
  6. 10. The wall that divides the left and right sides of the heart
  7. 11. The muscle tissue that makes up the heart
  8. 14. Cell fragments in the blood that allow clotting
  9. 16. The rhythmic expansion and contraction of arteries as blood flows through them
  10. 17. Delays the signal from the SA node to ensure the atrias are empty after the contraction
  11. 23. The heart's natural pacemaker, sends an electrical signal to the atrium to initiate the heartbeat