Body system

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Across
  1. 2. The waste gas produced during respiration.
  2. 3. Organ that churns food using acid and enzymes.
  3. 6. Tiny structures in the small intestine that absorb nutrients.
  4. 7. Tiny air sacs in the lungs where gas exchange takes place
  5. 8. Tube that connects the throat to the lungs.
  6. 10. The gas that we take in during breathing.
Down
  1. 1. The main organ where water is absorbed.
  2. 4. Organ that produces digestive juices and bile to help digestion.
  3. 5. A muscle that helps pull air into and push air out of the lungs.
  4. 9. The first part of the digestive system where food enters.