cardiovascular system

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Across
  1. 2. The human heart is the size of an adult ____.
  2. 3. The heart lies in this cavity.
  3. 6. A lower chamber of the heart is called this.
  4. 8. The Pulmonary ____ takes blood from the lungs to the heart.
  5. 9. An upper chamber of the heart is called this.
  6. 10. The middle, muscle layer of the heart wall.
  7. 11. The Pulmonary ______ takes blood from the heart to the lungs.
  8. 13. The blood flows from the Venae Cavae into which atrium?
  9. 14. The name of the valve between the left atrium and left ventricle.
Down
  1. 1. This septum is a muscular wall between the two ventricles.
  2. 4. This ventricle has the thickest walls of all four heart chambers.
  3. 5. The inner layer of the heart and valves, smooth layer of endothelial cells.
  4. 7. The name of the valve between the Right atrium and Right ventricle.
  5. 11. The largest artery in the body.
  6. 12. This septum separates the right and left atrium.