Rianna Mallorca - Circulatory System Puzzle

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Across
  1. 2. thick middle layer of heart wall
  2. 3. larger arteries and veins that attach to the atria and ventricles and transport blood to and from the systemic circulatory system and the pulmonary circulatory system
  3. 4. receives oxygenated blood from the lungs via the pulmonary veins
  4. 7. located underneath the sternum in a thoracic compartment called the mediastinum, which occupies the space between the lungs
  5. 8. another name for left atrioventricular valve (or AV valve)
  6. 10. transports oxygen-depleted blood from the upper extremities
  7. 12. larger, elastic artery
  8. 13. the first and last name of the person who made this crossword puzzle
  9. 17. the thin, tendon-like cords that connect the AV valves to cone-shaped muscles that extend upward from the myocardium
  10. 19. covering inner surface of heart wall
  11. 20. cone-shaped muscles that extend upward from the myocardium
  12. 21. endocardium is made up of thin layers of
Down
  1. 1. blood passively flows into the ventricles from the atria through these
  2. 5. number of heart valves
  3. 6. the ventricles enter a period of relaxation
  4. 9. transports oxygen-depleted blood from lower extremities
  5. 11. receives deoxygenated blood from the body through veins
  6. 14. sequence of events that occur in the heart with each beat
  7. 15. another name for right atrioventricular valve (or AV valve)
  8. 16. their overlapping arrangements create alternating dark (A) and light (I) bands or striations (similar to skeletal muscle)
  9. 18. covers the outer surface of the heart