Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button if available to get a clue. Note that you will lose points if you ask for hints or clues!
Aerobic Anaerobic carbon Energy enough glucose Lactic acid lactic acid little not all not enough oxygen oxygen debt pant water