Here's a breakdown of the process:

1. Glycolysis: Glucose is broken down into pyruvate, producing a small amount of ATP (adenosine triphosphate), the main energy currency of cells. This occurs in the cytoplasm of the cell.

2. Krebs Cycle (Citric Acid Cycle): Pyruvate enters the mitochondria and is further broken down, generating more ATP, NADH, and FADH2 (electron carriers).

3. Electron Transport Chain: NADH and FADH2 donate electrons, driving a series of reactions that create a proton gradient across the mitochondrial membrane. This gradient is used to generate the majority of ATP in the cell.

In summary:

Cellular respiration is a complex process that breaks down glucose in a step-by-step manner, releasing energy in the form of ATP that the cell can use for various functions.