ATP - The main energy currency of the cell., Glucose - A simple sugar that serves as the primary fuel for cellular respiration., Glycolysis - The first stage of respiration where glucose is broken down into pyruvate in the cytoplasm., Krebs Cycle - A series of reactions in the mitochondria that produce energy carriers (NADH, FADH₂) and CO₂., Electron Transport Chain - A chain of proteins in the mitochondria that use energy carriers to make large amounts of ATP., Mitochondria - The “powerhouse” of the cell where aerobic respiration takes place., Cytoplasm - The jellylike fluid in the cell where glycolysis occurs., NADH - An electron carrier that transfers high-energy electrons to the ETC., FADH₂ - Another electron carrier that delivers electrons to the ETC., Oxygen - The final electron acceptor in the ETC, combining with electrons and hydrogen to form water.,

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