circulatory system

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Across
  1. 1. narrow end of the heart
  2. 4. speaks mandarin and cantonese
  3. 9. blood enters the coronary circulatory system through these
  4. 10. fluid that contains red blood cells, white blood cells, plasma,and platelets
  5. 11. fibrous sac surrounding the heart
  6. 13. layer of heart wall that covers the outer surface of the heart
  7. 14. phase of cardiac cycle where heart contracts and pumps blood from chambers into arteries
  8. 15. vein that returns oxygenated blood from the lungs to the left atrium
  9. 16. valve that directs blood flow from ventricles into aorta and pulmonary trunk artery
  10. 17. large vein brings lower body's deoxygenated blood back to heart
  11. 19. valve that controls blood flow from right atrium to right ventricle
  12. 20. transports oxygen-depleted blood from upper extremities, head, and neck back to right atrium
  13. 22. joins cardiac myocytes together
Down
  1. 2. blood moves without needing exterior energy sources
  2. 3. supplies blood to both ventricles and posterior interventricular septum
  3. 5. thick middle layer of heart wall that has many cardiac muscle fibers
  4. 6. vein that drains blood from anterior ventricles
  5. 7. phase of cardiac cycle where heart returns to a relaxed state
  6. 8. sequence of events that occur in the heart with each beat
  7. 12. structure that carries blood through tissues and organs
  8. 18. largest artery that blood exits from
  9. 21. heart chamber that receives oxygen-poor blood