Crossword Puzzle Circulatory System

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Across
  1. 6. Thick middle layer of the heart wall
  2. 10. transport oxygen-depleted blood from the upper extremities, head, and neck
  3. 11. Layer forms both the inner wall of the pericardium
  4. 12. Pumps it into the aorta and distributes the blood through smaller arteries
  5. 16. The External layer formed by dense irregular connective tissue
  6. 17. Between the walls of the serous pericardium
  7. 18. Maintain the unidirectional flow of blood through the heart.
  8. 19. Covering the outer surface of the heart
  9. 20. transports oxygen-depleted blood from the thorax, abdomen, and lower extremities.
Down
  1. 1. A fibrous sack that surrounds the heart.
  2. 2. Gets deoxygenated blood from the body through veins, namely superior and inferior venae cavae
  3. 3. Covering the inner surface of the heart wall
  4. 4. A thin layer of serous membrane
  5. 5. Gets oxygenated blood from the lungs via the pulmonary veins
  6. 7. Pumps into the pulmonary artery and lungs to pick up oxygen-rich blood returning from the lungs
  7. 8. The board end of the heart
  8. 9. Helps the heart supply blood for itself
  9. 13. A larger, elastic artery
  10. 14. Maintain the unidirectional flow of blood through the heart
  11. 15. The Sequence of events that occur in the heart with each beat