BIO 110 Circulatory System

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Across
  1. 3. They carry the blood back to the heart.
  2. 4. The transition vessel between capillaries and veins.
  3. 7. Known as the pacemaker, controls the heartbeat.
  4. 8. They carry the blood away from the heart.
  5. 11. The lower chambers of the heart, sends the blood out.
  6. 12. Blood that is rich in oxygen is this.
  7. 13. The transition vessel between arteries and capillaries.
  8. 14. When you are in a relaxed state your heart rate will do this.
  9. 16. The largest artery, connected to the left ventricle of the heart.
  10. 17. The largest vein, connected to the right atria of the heart.
Down
  1. 1. Where the heart sends the blood to be re-oxygenated.
  2. 2. These let blood flow from the top chambers of the heart into the lower chambers.
  3. 5. The smallest of the blood vessels, where the blood transitions from arteries to veins.
  4. 6. Part of our circulatory system that ensures the blood only flows in the right direction.
  5. 9. The air we breathe out, our blood exchanges this for oxygen in the lungs.
  6. 10. Blood that is poor in oxygen is this.
  7. 15. The top chambers of the heart, receives the blood.