1. Glucose (C6H12O6): This is the primary fuel source for cellular respiration. It is a simple sugar that is broken down to release energy.

2. Oxygen (O2): This is the electron acceptor in cellular respiration. It combines with electrons and hydrogen ions to form water (H2O), releasing energy in the process.

3. Electron Carriers (NAD+ and FAD): These molecules are used to shuttle electrons during the process of cellular respiration. NAD+ (nicotinamide adenine dinucleotide) and FAD (flavin adenine dinucleotide) are electron carriers that accept electrons and hydrogen ions, becoming reduced to NADH and FADH2. These reduced forms then carry the electrons to the electron transport chain, where the energy is harvested to produce ATP.

While these are the essential ingredients, cellular respiration also requires certain cofactors and enzymes. These help to catalyze the reactions and ensure the process runs smoothly.

Here's a simplified summary:

Glucose + Oxygen + Electron Carriers → Carbon Dioxide + Water + Energy (ATP)