blood

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Across
  1. 3. blood pressure. makes the heart work harder.
  2. 7. takes blood from the heart.
  3. 9. makes co2
Down
  1. 1. vena cava. returns blood from the lower body
  2. 2. the main artery of the heart
  3. 4. pumps blood through the body
  4. 5. cava. carries deoxygenated blood to the heart
  5. 6. carries deoxygenated blood to the heart.
  6. 8. opens to let blood in the heart.
  7. 10. vena cava. returns blood from the upper body