Circulatory System Crossword

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Across
  1. 3. upper heart chambers that receive blood
  2. 4. cell particles that aid in clotting
  3. 6. lower heart chambers that pump blood
  4. 9. the liquid portion of blood
  5. 12. carries blood away from the heart
  6. 13. protein responsible for carrying oxygen in RBCs
  7. 17. carries blood towards the heart
  8. 19. blood flow throughout the body
  9. 21. innermost layer of the heart, lines chambers
  10. 22. a measure of the systolic over diastolic pressure
  11. 23. the organ responsible for pumping blood
Down
  1. 1. the smallest blood vessels
  2. 2. blood flow from the heart to lungs and back
  3. 5. fluid filled sac surrounding the heart
  4. 7. composed of the heart, blood, and vessels
  5. 8. red blood cells
  6. 10. the largest artery in the body, responsible for sending blood away from the left ventricle
  7. 11. branching tissue that makes up the walls of the heart
  8. 14. outermost layer of the heart
  9. 15. proteins in the bloodstream that recognize specific cell markers
  10. 16. protein present on cell membranes
  11. 18. muscular layer of the heart
  12. 20. white blood cells