Respiratory system

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Across
  1. 1. common substrate used for respiration
  2. 5. anaerobic respiration of yeast
  3. 6. membrane between ribs and lungs
  4. 8. Doesnt need oxygen for the process
  5. 9. Needs oxygen for the process
Down
  1. 2. formed from anaerobic respiration in muscles
  2. 3. muscles between ribs
  3. 4. another name for windpipe
  4. 7. sheet of muscle separating thorax from abdomen