Cardio Vascular System

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Across
  1. 7. A partition separating two chambers, such as that between the nostrils or the chambers of the heart.
  2. 8. The node that generates an electrical signal that causes the atria to contract.
  3. 9. The law states that the stroke volume of the heart increases in response to an increase in the volume of blood in the ventricles.
  4. 12. The main artery of the body, supplying oxygenated blood to the circulatory system.
  5. 13. A type of internal friction that resists the compression or expansion of a fluid.
  6. 16. The innermost layer of tissue that lines the chambers of the heart.
  7. 18. The dilatation of blood vessels, which decreases blood pressure.
  8. 19. The phase of the heartbeat when the heart muscle relaxes and allows the chambers to fill with blood.
  9. 21. Branches of specialized nerve cells.
  10. 23. Flaps that act as inlets for blood coming into a ventricle and outlets for blood leaving a ventricle.
  11. 24. Relating to the lungs.
  12. 25. The outermost protective layer of the heart.
  13. 27. Any of the tubes forming part of the blood circulation system of the body.
Down
  1. 1. A period of contraction of the ventricles of the heart that occurs between the first and second heart sounds of the cardiac cycle.
  2. 2. An irregular, often rapid heart rate that commonly causes poor blood flow.
  3. 3. The of blood vessels by small muscles in their walls.
  4. 4. A blood vessel that carries blood from the heart to tissues and organs in the body.
  5. 5. A large vein that carries blood to the heart from other areas of the body.
  6. 6. The middle muscular layer of the heart.
  7. 10. The thin, fluid-filled sac that surrounds the heart.
  8. 11. Muscular chamber that pumps blood out of the heart and into the circulatory system.
  9. 14. The amount of blood ejected from the ventricle with each cardiac cycle.
  10. 15. Each of the two upper cavities of the heart from which blood is passed to the ventricles.
  11. 17. A very small blood vessel that branches off from your artery and carries blood away from your heart to your tissues and organs.
  12. 18. A forceful attempt at expiration when the airway is closed at some point.
  13. 20. A small vein.
  14. 22. The outermost protective layer of the heart.
  15. 25. A quick test to check the heartbeat.
  16. 26. The electrical relay station between the upper and lower chambers of the heart.