Circulatory system and the heart

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Across
  1. 2. organ that pumps blood
  2. 4. the tissue that the heart is made of
  3. 8. system responsible for blood circulation
  4. 9. blood picks up this from the lungs and takes to other parts of the body
Down
  1. 1. blood vessels that carry blood to the heart
  2. 3. two bottom chambers of the heart
  3. 5. the type of muscle the heart is made of
  4. 6. two top chambers of the heart
  5. 7. vessels that carry blood away from the heart