Biology

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Across
  1. 2. The temporary shortage of oxygen after exercise needed to break down accumulated lactic acid
  2. 7. means with oxygen or with air
  3. 11. Where lactic acid is broken down
  4. 12. Gas released during aerobic respiration
  5. 13. Hair like structures that waft contaminated mucus up and away from the lungs.
  6. 14. The part of the human body cavity enclosed by the ribs, containing the lungs and heart
  7. 15. A specialised cell that secretes mucus
Down
  1. 1. The chemical reaction that releases energy, happens in the mitochondria
  2. 3. protein that is involved in metabolic reaction as a biological catalyst
  3. 4. Powerhouse of the cell
  4. 5. Required for aerobic respiration
  5. 6. Tough connective tissue that prevents the trachea from collapsing when air pressure drops
  6. 8. Antagonistic muscle pairs found between the ribs that alter thoracic volume
  7. 9. Indicator that tests for carbon dioxide
  8. 10. without oxygen or air