Crossword heart

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Across
  1. 5. Valve positioned between the right ventricle and the pulmonary artery.
  2. 6. Two common carotid arteries located on each side of the neck branch from the aorta and provide blood to head, neck and brain.
  3. 8. Small artery.
  4. 10. Contraction phase of the heartbeat
  5. 13. Double-layered membrane surrounding the heart.
  6. 14. Gas that enters the blood through the lungs and travels to the heart to be pumped via arteries to all body cells
  7. 16. Relaxation phase of the heartbeat.
Down
  1. 1. Abnormal swishing sound caused by improper closure of the heart valves
  2. 2. Structure in veins or in the heart that temporarily closes an opening so that blood flows in only one direction.
  3. 3. Smallest type of blood vessel. Materials pass to and from the bloodstream through the thin capillary walls.
  4. 4. Beat of the heart as felt through the walls of the arteries.
  5. 7. Gas (waste) released by body cells, transported via veins to the heart, and then to the lungs for exhalation.
  6. 9. Largest artery in the body.
  7. 11. Partition or wall dividing a cavity; such as between the right and left atria (interatrial septum) and right and left ventricles (interventricular septum).
  8. 12. Largest type of blood vessel; carries blood away from the heart to all parts of the body.
  9. 15. Small vein.