Answer:
Carbon dioxide
Step-by-step explanation:
Cellular respiration is given by the equation; glucose + oxygen carbon dioxide + water + energy
C6H12O6 + 6O2 --> 6CO2 + 6H2O + 36 or 38 ATP
It has three phases; glycolysis that occurs in the cytoplasm of the cell then Krebs cycle that occurs in the matrix mitochondria then electron transport chain that occurs in the intermembrane space of the mitochondria.