Human body

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Across
  1. 4. Two spongy organs that occupy the chest cavity
  2. 6. Muscle separating chest and abdominal cavities
  3. 7. Muscles between the ribs
  4. 9. A poisonous gas, no taste or smell
  5. 10. They protect the chest cavity
Down
  1. 1. Process of breathing
  2. 2. Condition, Insufficient oxygen in body tissues
  3. 3. Surrounds and protects the lungs
  4. 5. You may do this when object is stuck in your throat
  5. 8. An average man’s lungs can hold ___ litres of air