Here's a breakdown of what cellular respiration entails:

* Glycolysis: This initial stage occurs in the cytoplasm, but it's crucial for setting the stage for the mitochondrial processes. It breaks down glucose into pyruvate, generating a small amount of ATP.

* Krebs Cycle (Citric Acid Cycle): This cycle takes place within the mitochondrial matrix. It further breaks down pyruvate, producing electron carriers (NADH and FADH2) and some ATP.

* Electron Transport Chain: This final stage occurs on the inner mitochondrial membrane. Electrons from NADH and FADH2 are passed along a chain of proteins, releasing energy that is used to pump protons across the membrane, creating a proton gradient.

* Oxidative Phosphorylation: The proton gradient drives the flow of protons back across the membrane through ATP synthase, generating large amounts of ATP.

So, while cellular respiration is the overarching process, the specific stages within the mitochondria are the Krebs cycle, electron transport chain, and oxidative phosphorylation.