Sunday Crossword Puzzle- Heart Structures

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Across
  1. 2. a layer that lines all the chambers and valves in the heart
  2. 4. smallest blood vessel; used for gas exchange
  3. 5. flap-like structures that ensure blood only flows in one direction
  4. 6. chambers/ hollow openings in the heart that blood passes through
  5. 8. ventricle/the lower chamber of the heart that pumps blood to the lungs
  6. 12. pumps oxygenated blood to all the tissues in the body
  7. 13. a layer of fat that is the outermost layer of the heart
  8. 15. trunk/where blood is pumped out of the heart and towards the lungs
  9. 16. septum/ separates the right ventricle and the left ventricle
Down
  1. 1. carry blood towards the heart
  2. 3. valves/ between atria and ventricle; prevent backflow of blood into the atria
  3. 7. carry blood away from the heart
  4. 9. atrium/the chamber that receives oxygenated blood from the pulmonary veins and pushes the blood through the bicuspid valve
  5. 10. valves/ between arteries and ventricles; prevents exiting blood from going back to the ventricle
  6. 11. a layer of muscle that makes up the bulk of the heart
  7. 14. atrium/a thin-walled chamber that pushes deoxygenated blood through the tricuspid valve
  8. 17. ventricle/thickest walls of all chambers; used to pump blood out to the whole body