Circulatory Sytem

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Across
  1. 3. tiny blood vessels that help connect your arteries and veins, aid in gas exchange
  2. 5. small vein that can collect blood from capillaries
  3. 7. two upper chambers of the heart
  4. 9. a large vein that carries deoxygenated blood to the heart
  5. 12. tubes in the body that carry deoxygenated blood towards the heart
  6. 13. small branch of an artery leading into capillaries
  7. 15. blood vessels that deliver oxygenated blood from the heart to different parts of the body
  8. 16. lacking oxygen in the blood
Down
  1. 1. muscle fibers in the right atrium responsible for initiating the heartbeat
  2. 2. various membranous structures whose function is to temporarily close passages or orifices
  3. 4. veins veins that receive blood from the arteries and ventricles
  4. 6. main artery of the body that supplies oxygenated blood to the circulatory system
  5. 8. blood that is enriched with oxygen
  6. 9. two lower chambers of the heart
  7. 10. dioxide a colorless, oderless gas produced by burning carbon and organic compounds
  8. 11. to grow less
  9. 14. pair of organs in the chest that supplies the body with oxygen and removes carbon dioxide