Heart and Circulatory system

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Across
  1. 2. - Throbbing of arteries due to heartbeat.
  2. 4. - Blood vessel that carries blood toward the heart.
  3. 5. - Phase when heart relaxes to fill with blood.
  4. 7. Blood Cell - Fights infections in the body.
  5. 10. - Protective sac around the heart.
  6. 11. - Largest artery in the body.
  7. 12. - Protein in red blood cells that carries oxygen.
  8. 14. - Phase when heart contracts to pump blood.
  9. 16. Blood Cell - Carries oxygen using hemoglobin.
  10. 17. - Blood low in oxygen.
  11. 18. - Related to the lungs.
  12. 19. - Prevents backflow of blood in the heart.
Down
  1. 1. - Muscular tissue of the heart.
  2. 2. - Cells that help in blood clotting.
  3. 3. - Movement of blood throughout the body.
  4. 4. Cava - Large vein carrying blood to the heart.
  5. 6. - Lower chamber of the heart that pumps blood out.
  6. 8. - Smallest blood vessels where gas exchange occurs.
  7. 9. - Upper chamber of the heart that receives blood.
  8. 12. - Organ that pumps blood throughout the body.
  9. 13. - Blood rich in oxygen.
  10. 15. - Blood vessel that carries blood away from the heart.