human body system by moses

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Across
  1. 4. upper part of the heart
  2. 6. lower part of the heart
  3. 8. a group of organs working together to create a system
  4. 10. takes blood away from the heart
  5. 12. filters your blood
  6. 13. an organ that exchanges oxygen and carbon dioxide with the blood
Down
  1. 1. large flat muscle that helps you breath
  2. 2. tubes that branch off of the larger bronchi
  3. 3. pathway air takes to the alveoli
  4. 5. small units in the kidney that filter the blood
  5. 6. takes blood to the heart
  6. 7. a group of cells that perform the same function
  7. 8. a collection of tissues working together
  8. 9. tiny sacs in your lungs that exchange the oxygen
  9. 11. the smallest life form