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Glycolysis

Aerobic Pathway

Anaerobic Pathway

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Transition Phase

The transition phase of cellular respiration takes place inside the matrix of the mitochondria. This phase involves the conversion of pyruvate molecules (that were made during glycolysis out in the cytoplasm) to molecules of acetyl-CoA. Acetyl-CoA is then capable of entering the next phase of aerobic cellular respiration which is the Kreb's Cycle.

Mitochondria are the primary energy generating organelles for eukaryotic organisms. They consist of two membranes, an outer and an inner that separate the innermost part of the mitochondria, called the matrix, from the outer compartment which is called the intermembrane space. The inner membrane is folded to increase surface area and the folds are referred to as cristae.