circulatory system crossword

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Across
  1. 4. carry nutrients and blood away from the heart
  2. 5. pumps blood through veins, arteries, and capillaries
  3. 9. connect veins and arteries
  4. 10. around how many liters are there of blood in the human body
Down
  1. 1. _______ vena cava, where veins connect from the top of the heart
  2. 2. _______ vena cava, where veins connect from the bottom of the heart
  3. 3. carry nutrients and blood to the heart
  4. 6. where oxygen-rich blood comes out of the heart
  5. 7. where gas exchange happens
  6. 8. go in one direction & let blood flow through heart