Circulatory System

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Across
  1. 3. A blood vessel that takes blood AWAY from the heart to the body’s organs is called ___.
  2. 5. The two upper chambers are called ___.
  3. 9. Where does blood get oxygen from?
  4. 11. _____ are tubes that carry blood back to the heart.
  5. 12. ____ are the smallest blood vessels in your vascular system.
  6. 13. blood that’s low in oxygen is sent to the ___.
Down
  1. 1. What main organ is incorporated in the circulatory system?
  2. 2. The two larger lower chambers are called ___.
  3. 4. What parts act like doors that control blood flow in the heart?
  4. 6. The heart has ___ layers.
  5. 7. The circulatory system pumps ___ from the heart to the lungs to get oxygen.
  6. 8. The heart has ___ chambers.
  7. 10. The left and right side is divided by a wall called the ___.