Blood Flow

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Across
  1. 2. chambers on the top of the heart are called
  2. 7. the largest chamber in the heart
  3. 9. oxygen is needed to produce... in muscles, the brain and others
  4. 12. blood vessels that carry blood from the lungs to the heart
Down
  1. 1. organs work together in your body to perform specific F........
  2. 3. the heart has...chambers
  3. 4. carry blood away from the heart and veins carry blood back to the heart
  4. 5. chambers at the bottom of the heart
  5. 6. blood vessels that carry blood to the heart
  6. 8. valve between the left atrium and left ventricle
  7. 10. Blood carries
  8. 11. valve between the right atrium and right ventricle