Here's a breakdown:

* Food (like glucose) is broken down into smaller molecules.

* This breakdown releases energy, which is captured in the form of ATP (adenosine triphosphate).

* ATP is the cell's primary energy currency, used to power various cellular processes.

Cellular respiration can be divided into several stages:

* Glycolysis: Glucose is broken down into pyruvate. This happens in the cytoplasm of the cell and doesn't require oxygen.

* Krebs cycle (or Citric Acid Cycle): Pyruvate is further broken down, producing some ATP and electron carriers (NADH and FADH2). This occurs in the mitochondria.

* Electron Transport Chain: The electron carriers deliver electrons, powering a process that generates the majority of ATP. This also occurs in the mitochondria and requires oxygen.

Let me know if you'd like more details about any of these stages!