1. RESPIRATION

2. INTRODUCTION All cells must have energy to function.
Glucose is a cell’s source of energy. In other words, glucose is cell food.
Glucose is often stored in organisms as a carbohydrate called starch. Many glucose molecules link together in order to from one starch molecule.

3. INTRODUCTION
In order to use starch, cells must break it down into the smaller glucose molecules. Usable chemical energy is stored in the bonds of glucose molecules.
Cell can release energy in 2 basic processes: Cellular respiration and Fermentation.

4. CELLULAR RESPIRATION
In cellular respiration, cells use oxygen to release energy stored in the bonds of glucose molecules.
Most of the energy used by the cells in your body is provided by cellular respiration.

5. LOCATION
Cellular respiration takes place in organelles called mitochondria.
Both plant cells and animal cells contain mitochondria, so both types of cells release energy through cellular respiration.

6. A CHEMICAL CHANGE Reactants Glucose (C6H12O6) from food
Oxygen (O2) from the air

7. A CHEMICAL CHANGE Chemical Reaction
Glucose molecules in the cytoplasm are broken down into smaller molecules.
These smaller molecules enter the mitochondria along oxygen, where they recombine to form new substances

8. A CHEMICAL CHANGE Products
Energy – some transferred to other molecules and sent to areas of the cells that need it; some released as heat.
Carbon Dioxide (CO2) – released into the air
Water (H2O) used by the organism

9. THE EQUATION
Glucose + Oxygen
Energy Water Carbon Dioxide

10. PUTTING IT ALL TOGETHER
CARBON DIOXIDE
GLUCOSE
MITOCHONDRION
ENERGY
OXYGEN
WATER