Circulatory System

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Across
  1. 3. upper chamber of the heart
  2. 8. blood cell that helps fight infection
  3. 11. tissue that flows through the circulatory system
  4. 12. Blood Vessels that carry blood back to the heart
  5. 13. fluid portion of blood
  6. 14. blood vessel the connects arteries and veins
  7. 16. brief period of relaxation in the heart
  8. 17. Double layered outermost layer of the heart
  9. 18. Blood cell required for the clotting process
  10. 20. valve between the L atrium and L ventricle
Down
  1. 1. Valve between R vent. & pulmonary artery
  2. 2. Complex protein on red blood cells
  3. 4. vessel that carries blood away from the heart
  4. 5. Valve between the left ventricle and aorta
  5. 6. innermost layer of the heart
  6. 7. period of ventricular contraction in the heart
  7. 9. Lower chamber of the heart
  8. 10. Muscular middle layer of the heart
  9. 15. blood cell that carries hemoglobin
  10. 19. wall that separates the heart into right and left