What happens to the energy liberated during respiration?

The energy liberated during respiration is not all in the form of heat but a large part of it is converted into chemical energy in the form of ATP (Adenosine Triphosphate). This energy is utilised by the body cells for a vast variety of activities like:

1. Digestion of food.
2. Production of enzymes.
3. Contraction of muscles for movement.
4. Conduction of electrical impulse in a nerve cell.
5. Production of new cells by cell division.
6. Keeping the body warm in warm-blooded animals.