Bio Chapter 30

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Across
  1. 4. it stimulates the heart muscles, and it regulates the heart contracting
  2. 6. pair of spongy, air filled organs located on either side of the lungs
  3. 9. when someone's airway closes, it makes them heard to breathe
  4. 10. the two chambers in the heart, left right
  5. 12. carries the blood away from the heart
Down
  1. 1. colorless fluid part of the blood, lymph or milk
  2. 2. the long tube that connects your voice box, flows oxygen from mouth to lungs
  3. 3. center of circulatory system, pumps blood
  4. 5. it exchanges co2 and oxygen when you breathe, flows oxygen
  5. 7. makes blood flow into heart
  6. 8. transports oxygen, nutrients and blood
  7. 11. carries the blood back to the heart