Untitled

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Across
  1. 2. the dividing wall between the right and left side of heart
  2. 7. Small mass of cells that slows the electrical current sent by the SA node (located at junction of atria and ventricles)
  3. 8. small branch of an artery leading into capillaries
  4. 10. provides blood supply that oxygenates and nourishes the heart (branch from base of aorta)
  5. 14. the fluid portion of the blood
  6. 16. thin sheet of endothelium that lines the heart chambers
  7. 17. pressure when the ventricles are relaxing
  8. 19. double sac of serous membrane that encloses the heart
  9. 20. vessels that carries blood away from the heart
Down
  1. 1. discharging chambers of the heart
  2. 3. SA node is tiny cell mass in the right atrium of the heart that sets the pace for the whole heart
  3. 4. tube that carries oxygen-depleted blood toward the heart
  4. 5. wide channel that receives blood from the coronary veins and empties it in the right atrium in the heart
  5. 6. a minute blood vessel connecting arterioles with venules
  6. 9. amount of pressure in the arteries during contraction of the heart
  7. 11. valve between the left atrium and the left ventricle of the heart
  8. 12. consists of thick bundles of cardiac muscle twisted into ringlike arrangements
  9. 13. amount of blood pumped out by each side of the heart in 1 minute
  10. 15. rhythmic expansion and recoil of arteries resulting from heart contraction
  11. 18. network of interweaving capillaries supplying an organ