Science

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Across
  1. 2. lower chamber of heart
  2. 6. where digestion begins
  3. 8. brings blood away from heart
  4. 9. organ that exchanges O2 to CO2
  5. 10. large muscular sack
  6. 11. allows air to pass through and from the lungs
  7. 12. Building block of life
Down
  1. 1. - Liquid part of blood
  2. 3. that connects mouth to stomach
  3. 4. upper chamber of heart
  4. 5. direct passage of air into the lungs
  5. 7. brings blood back to heart
  6. 9. intestine absorbs water
  7. 10. intestine absorbs nutrients