1. Energy: How do I Recharge my batteries?

2. Energy The ability to do work.
All living organisms need energy to grow and reproduce.

4. What does that mean for us?
Therefore, organisms cannot create the energy they need. They have to get energy from the environment.
Organisms cannot use up the energy they obtain. They can only change it from one form to another.

5. About 90 percent of the energy organisms obtain from food is converted to heat energy that is given off to the environment

6. ATP Adenosine triphosphate (ATP) is the energy source for cells.
Transports chemical energy within cells for metabolism.
Metabolic processes that use ATP as an energy source convert it back into its ADP.
ATP is therefore continuously recycled in organisms: the human body turns over its own weight in ATP each day.