Cardiovascular

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Across
  1. 2. Either of the two upper chambers of the heart.
  2. 3. Phase of the cardiac cycle when a heart chamber wall contracts.
  3. 4. Phase of the cardiac cycle when a heart chamber wall relaxes.
  4. 5. Serous membrane that surrounds the heart.
  5. 6. Vessel that transports blood toward the heart.
  6. 9. Sequence of myocardial contraction and relaxation that constitutes a complete heartbeat.
  7. 14. The organ system that includes the heart and the blood vessels.
  8. 15. Small branch of an artery that communicates with a capillary network.
  9. 17. Vessel that transports blood from the heart.
  10. 18. Major systemic artery that receives blood directly from the left ventricle.
  11. 19. System of blood vessels that transports blood between the heart and the lungs.
  12. 21. Small blood vessel that connects an arteriole and a venule and allows diffusional exchange of nutrients and waste.
  13. 23. Specialized cardiac muscle fibers that conduct cardiac impulses from the AV bundle into the ventricular walls.
  14. 24. Inner lining of the heart chambers.
  15. 25. A wall-like partition that separates two chambers, such as the right and left sides of the heart.
Down
  1. 1. Heart valve between the right atrium and the right ventricle.
  2. 2. Flaplike structure in the wall of the aorta near its origin that prevents blood from returning to the left ventricle of the heart; aortic semilunar valve.
  3. 3. Vessels that transport blood between the heart and all body tissues except the lungs.
  4. 7. Specialized tissue in the wall of the right atrium that initiates cardiac cycles; the pacemaker.
  5. 8. Specialized mass of cardiac muscle fibers in the interatrial septum of the heart that transmits cardiac impulses from the sinoatrial node to the AV bundle.
  6. 10. Visceral part of the pericardium on the surface of the heart.
  7. 11. Heart valve between the left atrium and the left ventricle; bicuspid valve.
  8. 12. One of two large veins (superior and inferior) that convey oxygen-poor blood to the right atrium of the heart.
  9. 13. The two lower chambers of the heart
  10. 16. Recording of the electrical activity associated with the cardiac cycle.
  11. 20. Muscle layer of the heart.
  12. 22. Vessel that transports blood from capillaries to a vein.