The circulatory system

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Across
  1. 3. the upper portion of the heart
  2. 4. number of functions the heart contains
  3. 5. returns blood to the heart
  4. 7. main organ of circulatory system
  5. 9. circulates blood through lungs
  6. 12. how many major blood circuits
  7. 15. works to circulate lymph into the body
Down
  1. 1. bottom portion of the heart
  2. 2. heart, blood, and blood vessels
  3. 6. carries blood away from the heart
  4. 8. the cavity the heart resides in
  5. 10. the heart is ______ to the lungs
  6. 11. approximate size of heart
  7. 13. carries oxygen rich blood to the body
  8. 14. action taken by the heart with blood