Here's how it works:
* Food (like carbohydrates, fats, and proteins) contains stored chemical energy.
* Oxygen acts as an electron acceptor in cellular respiration.
* The energy stored in the food is released through a series of chemical reactions, and this energy is used to power the organism's life processes, like movement, growth, and repair.
* Carbon dioxide and water are produced as byproducts of this process.
So, oxygen is essential for organisms to extract energy from food and carry out their vital functions.
