| Definition | Aerobic respiration uses oxygen. | Anaerobic respiration is respiration without oxygen; | 
          
            | What cells use this process | Aerobic respiration occurs in most cells. | Anaerobic respiration occurs in bacteria, yeasts, some prokaryotes, red blood cells, and in muscle cells. | 
          
            | Final products | Glucose is completely broken down into carbon dioxide and water | Glucose is partially broken down into  lactic acid (in lactic acid fermentation) or into ethanol and carbon dioxide, as occurs in yeast cells during alcoholic fermentation. | 
          
            | Amount of energy released per glucose molecule | Between 36-38 ATP molecules | Only 2 ATP molecules | 
          
            | Reactants | glucose, oxygen | glucose | 
          
            | Site of reactions | Cytoplasm and mitochondria | Cytoplasm | 
          
            | Stages | Glycolysis, Krebs cycle | Glycolysis, Fermentation |