* Food contains chemical bonds: Food, whether it's plants, meat, or other sources, is made up of organic molecules like carbohydrates, proteins, and fats. These molecules have chemical bonds that store potential energy.
* Digestion breaks down food: When animals eat, their digestive systems break down the food into smaller molecules, like glucose (from carbohydrates), amino acids (from proteins), and fatty acids (from fats).
* Cells use these molecules: Cells then absorb these smaller molecules and use them in various processes, primarily cellular respiration.
* Cellular respiration releases energy: During cellular respiration, the chemical bonds in glucose, amino acids, and fatty acids are broken, releasing the stored potential energy as ATP (adenosine triphosphate). ATP is the primary energy currency of cells, powering all their activities.
In summary: Animals obtain chemical potential energy from the bonds within food molecules. This energy is then released through cellular respiration, providing the energy needed for all bodily functions.
