1. Cellular Respiration

2. Cellular Respiration
The process by which cells obtain energy from glucose by breaking down simple food molecules, such as sugar, and releasing the stored energy.
C6H12O6 + 6O2  6CO2   +   6H2O +   ENERGY

3. Two stages of Cellular Respiration
In the cytoplasm, glucose is broken down into smaller molecules; oxygen is not involved and only a small amount of energy is released.
Takes place in the mitochondria – there, molecules are broken down even further by chemical reactions. These chemical reactions require oxygen and release a great deal of energy.
CO2 and H2O are also released – in most animals these two products leave the body by exhaling.