Ashley's cardiovascular puzzle

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Across
  1. 3. Lower tip of the heart.
  2. 6. Small artery.
  3. 7. Gas that enters the blood through the lungs and travels to the heart to be pumped via arteries to all body cells
  4. 10. Largest type of blood vessel; carries blood away from the heart to all parts of the body.
  5. 11. Muscular middle layer of the heart.
  6. 13. Record of the electrical activity of the heart.
  7. 15. Artery carrying oxygen-poor blood from the heart to the lungs.
  8. 17. Two common carotid arteries located on each side of the neck branch from the aorta and provide blood to head, neck and brain.
Down
  1. 1. Inner lining of the heart.
  2. 2. Abnormal swishing sound caused by improper closure of the heart valves
  3. 4. Beat of the heart as felt through the walls of the arteries.
  4. 5. Smallest type of blood vessel.
  5. 8. Largest vein in the body.
  6. 9. Largest artery in the body.
  7. 12. Thin-walled vessel that carries blood from body tissues and lungs back to the heart.
  8. 14. Relaxation phase of the heartbeat.
  9. 16. One of two lower chambers of the heart.