Explanation:
Calories are the amount of energy stored in food does energy is used within the 10 day bye a calorie is the specific amount of energy required to reuse a kilogram of water by 1°C.
These calories within food are obtained from nutrients in food. These are chemically and mechanically broken down in the digestive system- they are reduced into compounds whichhave been converted into energy molecules called ATP or adenosine triphosphate.
ATP is made via several complex pathways in the body during the process of cellular respiration and is crucial to survival of cells, tissues, organs and organisms.
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