Not enough oxygen may reach the muscles during exercise. When
this happens, they use anaerobic respiration to obtain energy
Anaerobic respiration involves the incomplete breakdown of
glucose. It releases around 5% of the energy released by
aerobic respiration, per molecule of glucose.
glucose → lactic acid (+ little energy)
The waste product is lactic acid rather than
carbon dioxide and water:
Aerobic Respiration
glucose + oxygen → carbon dioxide + water (+ energy)
Aerobic respiration is the form of
respiration which uses oxygen.
Aerobic respiration happens all the time in the
cells of animals and plants. Most of the reactions
involved happen inside mitochondria