Respiration
This knowledge is used in careers such as:
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Example:
Imagine trying to power your smartphone by plugging it into an electrical outlet. Just like your phone needs electricity to keep working, your cells need oxygen to function properly. In this analogy, the electrical outlet is like the oxygen your cells use, the phone is your body, and the charging process is the breakdown of food in your cells that releases energy. The excess heat your phone might generate while charging is like the carbon dioxide your cells release as a byproduct of generating energy.
Practice Version
Respiration: The use of oxygen by cells to break down food, and release carbon dioxide and energy. Respiration is the process by which living cells obtain energy from food.