Chapter 18,19,20

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Across
  1. 5. pacemaker: Device regulating heartbeats.
  2. 7. (plural = atria): Heart's upper chambers pumping blood.
  3. 9. Iron-containing pigment in hemoglobin.
  4. 11. pathway: Coagulation pathway triggered by tissue damage.
  5. 13. valve: Valve at the base of the aorta.
  6. 14. Heart's ability to self-initiate contractions.
  7. 16. leukocytes: White blood cells with granules.
  8. 17. septum: Wall dividing the heart's ventricles.
  9. 18. Protein component of hemoglobin.
  10. 20. Insoluble protein forming blood clots.
  11. 21. Embryonic germ layer.
  12. 22. Percentage of red blood cells in blood.
  13. 24. bundle: Pathway for impulses between atria.
  14. 25. disc: Junctions allowing cardiac cell communication.
  15. 27. arteries: Branches supplying right ventricle's surface.
Down
  1. 1. (AV) node: Myocardial cluster transmitting impulses within the heart.
  2. 2. Breakdown of a blood clot.
  3. 3. mechanism: Increased stretch boosts heart contraction force.
  4. 4. Outer layer of the heart wall.
  5. 6. Blood-clotting plasma protein.
  6. 8. rate (HR): Number of heartbeats per minute.
  7. 10. Plasma proteins with various roles.
  8. 11. (EPO): Hormone stimulating red blood cell production.
  9. 12. ovalis: Depression marking the former foramen ovale.
  10. 13. Extension of an atrium on the heart's superior surface.
  11. 14. Extension of an atrium on the heart's superior surface.
  12. 15. block: Disruption in the heart's conduction pathway.
  13. 19. cardiac vein: Drains blood from heart's front.
  14. 23. reflex: Heart rate increase from atrial stretch.
  15. 26. ovale: Fetal heart opening bypassing lungs.