The formula for Cellular Respiration: C6H12O6 + 6O2 -> 6CO2 + 6H2O this is an aerobic reaction.
The first part of Cellular Respiration is Glycolysis. This process is also used in fermentation. It can occur with or without oxygen. All living organisms have to go through this process. It takes place in the cytoplasm.
The first of 2 stages in Cellular Respiration is the Krebs Cycle. This takes place in the matrix of the mitochondria. During this process pyruvic acid is broken down into carbon dioxide and 3 more NADH are made. Then 2 FADH2 are made finally 2 ATP are released.
The last stage is ETC and this occurs in the cristae of the mitochondria. The NADH and FADH2 are used ADP is converted into ATP. Oxygen is a reactant and water is a product. Most of the ATP comes from ETC.
Since ATP is the main energy source of life Cellular Respiration is very important for life on this earth without it we would be much less than we are now.
Sources: Notes from Class.